Remove required ConfigClass (#36609)

* remove LoggingConfig class

* get rid of ElasticsearchConfig class

* get rid of PluginsConfig class

* get rid of HttpConfig Class

* update ConfigService

* update LegacyService

* update testbed plugin

* update docs

docs/development/core/server/kibana-plugin-server.corestart.md

@@ -4,6 +4,7 @@
 
 ## CoreStart interface
 
+
 <b>Signature:</b>
 
 ```typescript

docs/development/core/server/kibana-plugin-server.discoveredplugin.configpath.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [DiscoveredPlugin](./kibana-plugin-server.discoveredplugin.md) &gt; [configPath](./kibana-plugin-server.discoveredplugin.configpath.md)
+
+## DiscoveredPlugin.configPath property
+
+Root configuration path used by the plugin, defaults to "id".
+
+<b>Signature:</b>
+
+```typescript
+readonly configPath: ConfigPath;
+```

docs/development/core/server/kibana-plugin-server.discoveredplugin.id.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [DiscoveredPlugin](./kibana-plugin-server.discoveredplugin.md) &gt; [id](./kibana-plugin-server.discoveredplugin.id.md)
+
+## DiscoveredPlugin.id property
+
+Identifier of the plugin.
+
+<b>Signature:</b>
+
+```typescript
+readonly id: PluginName;
+```

docs/development/core/server/kibana-plugin-server.discoveredplugin.md

@@ -0,0 +1,23 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [DiscoveredPlugin](./kibana-plugin-server.discoveredplugin.md)
+
+## DiscoveredPlugin interface
+
+Small container object used to expose information about discovered plugins that may or may not have been started.
+
+<b>Signature:</b>
+
+```typescript
+export interface DiscoveredPlugin 
+```
+
+## Properties
+
+|  Property | Type | Description |
+|  --- | --- | --- |
+|  [configPath](./kibana-plugin-server.discoveredplugin.configpath.md) | <code>ConfigPath</code> | Root configuration path used by the plugin, defaults to "id". |
+|  [id](./kibana-plugin-server.discoveredplugin.id.md) | <code>PluginName</code> | Identifier of the plugin. |
+|  [optionalPlugins](./kibana-plugin-server.discoveredplugin.optionalplugins.md) | <code>ReadonlyArray&lt;PluginName&gt;</code> | An optional list of the other plugins that if installed and enabled \*\*may be\*\* leveraged by this plugin for some additional functionality but otherwise are not required for this plugin to work properly. |
+|  [requiredPlugins](./kibana-plugin-server.discoveredplugin.requiredplugins.md) | <code>ReadonlyArray&lt;PluginName&gt;</code> | An optional list of the other plugins that \*\*must be\*\* installed and enabled for this plugin to function properly. |
+

docs/development/core/server/kibana-plugin-server.discoveredplugin.optionalplugins.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [DiscoveredPlugin](./kibana-plugin-server.discoveredplugin.md) &gt; [optionalPlugins](./kibana-plugin-server.discoveredplugin.optionalplugins.md)
+
+## DiscoveredPlugin.optionalPlugins property
+
+An optional list of the other plugins that if installed and enabled \*\*may be\*\* leveraged by this plugin for some additional functionality but otherwise are not required for this plugin to work properly.
+
+<b>Signature:</b>
+
+```typescript
+readonly optionalPlugins: ReadonlyArray<PluginName>;
+```

docs/development/core/server/kibana-plugin-server.discoveredplugin.requiredplugins.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [DiscoveredPlugin](./kibana-plugin-server.discoveredplugin.md) &gt; [requiredPlugins](./kibana-plugin-server.discoveredplugin.requiredplugins.md)
+
+## DiscoveredPlugin.requiredPlugins property
+
+An optional list of the other plugins that \*\*must be\*\* installed and enabled for this plugin to function properly.
+
+<b>Signature:</b>
+
+```typescript
+readonly requiredPlugins: ReadonlyArray<PluginName>;
+```

docs/development/core/server/kibana-plugin-server.md

@@ -9,7 +9,6 @@
 |  Class | Description |
 |  --- | --- |
 |  [ClusterClient](./kibana-plugin-server.clusterclient.md) | Represents an Elasticsearch cluster API client and allows to call API on behalf of the internal Kibana user and the actual user that is derived from the request headers (via <code>asScoped(...)</code>). |
-|  [ConfigService](./kibana-plugin-server.configservice.md) |  |
 |  [KibanaRequest](./kibana-plugin-server.kibanarequest.md) |  |
 |  [Router](./kibana-plugin-server.router.md) |  |
 |  [ScopedClusterClient](./kibana-plugin-server.scopedclusterclient.md) | Serves the same purpose as "normal" <code>ClusterClient</code> but exposes additional <code>callAsCurrentUser</code> method that doesn't use credentials of the Kibana internal user (as <code>callAsInternalUser</code> does) to request Elasticsearch API, but rather passes HTTP headers extracted from the current user request to the API |
@@ -22,6 +21,7 @@
 |  [CallAPIOptions](./kibana-plugin-server.callapioptions.md) | The set of options that defines how API call should be made and result be processed. |
 |  [CoreSetup](./kibana-plugin-server.coresetup.md) |  |
 |  [CoreStart](./kibana-plugin-server.corestart.md) |  |
+|  [DiscoveredPlugin](./kibana-plugin-server.discoveredplugin.md) | Small container object used to expose information about discovered plugins that may or may not have been started. |
 |  [ElasticsearchServiceSetup](./kibana-plugin-server.elasticsearchservicesetup.md) |  |
 |  [HttpServiceStart](./kibana-plugin-server.httpservicestart.md) |  |
 |  [Logger](./kibana-plugin-server.logger.md) | Logger exposes all the necessary methods to log any type of information and this is the interface used by the logging consumers including plugins. |
@@ -31,6 +31,8 @@
 |  [Plugin](./kibana-plugin-server.plugin.md) | The interface that should be returned by a <code>PluginInitializer</code>. |
 |  [PluginInitializerContext](./kibana-plugin-server.plugininitializercontext.md) | Context that's available to plugins during initialization stage. |
 |  [PluginSetupContext](./kibana-plugin-server.pluginsetupcontext.md) | Context passed to the plugins <code>setup</code> method. |
+|  [PluginsServiceSetup](./kibana-plugin-server.pluginsservicesetup.md) |  |
+|  [PluginsServiceStart](./kibana-plugin-server.pluginsservicestart.md) |  |
 |  [PluginStartContext](./kibana-plugin-server.pluginstartcontext.md) | Context passed to the plugins <code>start</code> method. |
 
 ## Type Aliases

docs/development/core/server/kibana-plugin-server.plugininitializercontext.config.md

@@ -8,7 +8,7 @@
 
 ```typescript
 config: {
-        create: <Schema extends Type<any>, Config>(ConfigClass: ConfigWithSchema<Schema, Config>) => Observable<Config>;
-        createIfExists: <Schema extends Type<any>, Config>(ConfigClass: ConfigWithSchema<Schema, Config>) => Observable<Config | undefined>;
+        create: <Schema>() => Observable<Schema>;
+        createIfExists: <Schema>() => Observable<Schema | undefined>;
     };
 ```

docs/development/core/server/kibana-plugin-server.plugininitializercontext.md

@@ -16,7 +16,7 @@ export interface PluginInitializerContext
 
 |  Property | Type | Description |
 |  --- | --- | --- |
-|  [config](./kibana-plugin-server.plugininitializercontext.config.md) | <code>{`<p/>`        create: &lt;Schema extends Type&lt;any&gt;, Config&gt;(ConfigClass: ConfigWithSchema&lt;Schema, Config&gt;) =&gt; Observable&lt;Config&gt;;`<p/>`        createIfExists: &lt;Schema extends Type&lt;any&gt;, Config&gt;(ConfigClass: ConfigWithSchema&lt;Schema, Config&gt;) =&gt; Observable&lt;Config &#124; undefined&gt;;`<p/>`    }</code> |  |
+|  [config](./kibana-plugin-server.plugininitializercontext.config.md) | <code>{`<p/>`        create: &lt;Schema&gt;() =&gt; Observable&lt;Schema&gt;;`<p/>`        createIfExists: &lt;Schema&gt;() =&gt; Observable&lt;Schema &#124; undefined&gt;;`<p/>`    }</code> |  |
 |  [env](./kibana-plugin-server.plugininitializercontext.env.md) | <code>{`<p/>`        mode: EnvironmentMode;`<p/>`    }</code> |  |
 |  [logger](./kibana-plugin-server.plugininitializercontext.logger.md) | <code>LoggerFactory</code> |  |
 

docs/development/core/server/kibana-plugin-server.pluginsservicesetup.contracts.md

@@ -0,0 +1,11 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [PluginsServiceSetup](./kibana-plugin-server.pluginsservicesetup.md) &gt; [contracts](./kibana-plugin-server.pluginsservicesetup.contracts.md)
+
+## PluginsServiceSetup.contracts property
+
+<b>Signature:</b>
+
+```typescript
+contracts: Map<PluginName, unknown>;
+```

docs/development/core/server/kibana-plugin-server.pluginsservicesetup.md

@@ -0,0 +1,20 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [PluginsServiceSetup](./kibana-plugin-server.pluginsservicesetup.md)
+
+## PluginsServiceSetup interface
+
+
+<b>Signature:</b>
+
+```typescript
+export interface PluginsServiceSetup 
+```
+
+## Properties
+
+|  Property | Type | Description |
+|  --- | --- | --- |
+|  [contracts](./kibana-plugin-server.pluginsservicesetup.contracts.md) | <code>Map&lt;PluginName, unknown&gt;</code> |  |
+|  [uiPlugins](./kibana-plugin-server.pluginsservicesetup.uiplugins.md) | <code>{`<p/>`        public: Map&lt;PluginName, DiscoveredPlugin&gt;;`<p/>`        internal: Map&lt;PluginName, DiscoveredPluginInternal&gt;;`<p/>`    }</code> |  |
+

docs/development/core/server/kibana-plugin-server.pluginsservicesetup.uiplugins.md

@@ -0,0 +1,14 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [PluginsServiceSetup](./kibana-plugin-server.pluginsservicesetup.md) &gt; [uiPlugins](./kibana-plugin-server.pluginsservicesetup.uiplugins.md)
+
+## PluginsServiceSetup.uiPlugins property
+
+<b>Signature:</b>
+
+```typescript
+uiPlugins: {
+        public: Map<PluginName, DiscoveredPlugin>;
+        internal: Map<PluginName, DiscoveredPluginInternal>;
+    };
+```

docs/development/core/server/kibana-plugin-server.pluginsservicestart.contracts.md

@@ -0,0 +1,11 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [PluginsServiceStart](./kibana-plugin-server.pluginsservicestart.md) &gt; [contracts](./kibana-plugin-server.pluginsservicestart.contracts.md)
+
+## PluginsServiceStart.contracts property
+
+<b>Signature:</b>
+
+```typescript
+contracts: Map<PluginName, unknown>;
+```

docs/development/core/server/kibana-plugin-server.pluginsservicestart.md

@@ -0,0 +1,19 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [PluginsServiceStart](./kibana-plugin-server.pluginsservicestart.md)
+
+## PluginsServiceStart interface
+
+
+<b>Signature:</b>
+
+```typescript
+export interface PluginsServiceStart 
+```
+
+## Properties
+
+|  Property | Type | Description |
+|  --- | --- | --- |
+|  [contracts](./kibana-plugin-server.pluginsservicestart.contracts.md) | <code>Map&lt;PluginName, unknown&gt;</code> |  |
+