[Infra UI] Add APM to Metadata Endpoint

- Adds APM feature to metadata
- Closes elastic#42167
- Based on elastic#41836

x-pack/legacy/plugins/infra/server/lib/adapters/framework/adapter_types.ts

@@ -9,6 +9,7 @@ import { GraphQLSchema } from 'graphql';
 import { Lifecycle, ResponseToolkit, RouteOptions } from 'hapi';
 import { Legacy } from 'kibana';
 
+import { KibanaConfig } from 'src/legacy/server/kbn_server';
 import { JsonObject } from '../../../../common/typed_json';
 import { InfraMetricModel } from '../metrics/adapter_types';
 
@@ -60,6 +61,7 @@ export interface InfraBackendFrameworkAdapter {
     timerange: { min: number; max: number },
     filters: JsonObject[]
   ): Promise<InfraTSVBResponse>;
+  config(req: InfraFrameworkRequest): KibanaConfig;
 }
 /* eslint-enable  @typescript-eslint/unified-signatures */
 

x-pack/legacy/plugins/infra/server/lib/adapters/framework/kibana_framework_adapter.ts

@@ -8,6 +8,7 @@ import { GenericParams } from 'elasticsearch';
 import { GraphQLSchema } from 'graphql';
 import { Legacy } from 'kibana';
 
+import { KibanaConfig } from 'src/legacy/server/kbn_server';
 import { InfraMetricModel } from '../metrics/adapter_types';
 import {
   InfraBackendFrameworkAdapter,
@@ -36,6 +37,11 @@ export class InfraKibanaBackendFrameworkAdapter implements InfraBackendFramework
     this.version = server.config().get('pkg.version');
   }
 
+  public config(req: InfraFrameworkRequest<Legacy.Request>): KibanaConfig {
+    const internalRequest = req[internalInfraFrameworkRequest];
+    return internalRequest.server.config();
+  }
+
   public exposeStaticDir(urlPath: string, dir: string): void {
     this.server.route({
       handler: {

x-pack/legacy/plugins/infra/server/routes/metadata/index.ts

@@ -16,6 +16,7 @@ import {
 import { InfraBackendLibs } from '../../lib/infra_types';
 import { getMetricMetadata } from './lib/get_metric_metadata';
 import { pickFeatureName } from './lib/pick_feature_name';
+// import { hasAPMData } from './lib/has_apm_data';
 import { getCloudMetricsMetadata } from './lib/get_cloud_metric_metadata';
 import { getNodeInfo } from './lib/get_node_info';
 import { throwErrors } from '../../../common/runtime_types';
@@ -54,6 +55,15 @@ export const initMetadataRoute = (libs: InfraBackendLibs) => {
           nameToFeature('metrics')
         );
 
+        // const hasAPMData = await hasAPMData(
+        //   framework,
+        //   req,
+        //   configuration,
+        //   nodeId,
+        //   nodeType
+        // );
+        // const apmMetricData = hasAPMData ? [{ name: 'apm.transaction', source: 'apm' }] : [];
+
         const id = metricsMetadata.id;
         const name = metricsMetadata.name || id;
         return InfraMetadataRT.decode({