[ML] Transforms: Migrate server plugin to NP. (#58714) (#59115)

Migrate transform legacy server to NP.
- Create server plugin/index for transform in x-pack/plugins.
- Move all legacy/server files to plugins/transform

x-pack/.i18nrc.json

@@ -39,7 +39,7 @@
     "xpack.snapshotRestore": "legacy/plugins/snapshot_restore",
     "xpack.spaces": ["legacy/plugins/spaces", "plugins/spaces"],
     "xpack.taskManager": "legacy/plugins/task_manager",
-    "xpack.transform": "legacy/plugins/transform",
+    "xpack.transform": ["legacy/plugins/transform", "plugins/transform"],
     "xpack.triggersActionsUI": "plugins/triggers_actions_ui",
     "xpack.upgradeAssistant": "plugins/upgrade_assistant",
     "xpack.uptime": "legacy/plugins/uptime",

x-pack/legacy/plugins/transform/index.ts

@@ -4,11 +4,9 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import { Legacy } from 'kibana';
 import { resolve } from 'path';
+
 import { PLUGIN } from './common/constants';
-import { Plugin as TransformPlugin } from './server/plugin';
-import { createServerShim } from './server/shim';
 
 export function transform(kibana: any) {
   return new kibana.Plugin({
@@ -20,20 +18,5 @@ export function transform(kibana: any) {
       styleSheetPaths: resolve(__dirname, 'public/app/index.scss'),
       managementSections: ['plugins/transform'],
     },
-    init(server: Legacy.Server) {
-      const { core, plugins } = createServerShim(server, PLUGIN.ID);
-      const transformPlugin = new TransformPlugin();
-
-      // Start plugin
-      transformPlugin.start(core, plugins);
-
-      // Register license checker
-      plugins.license.registerLicenseChecker(
-        server,
-        PLUGIN.ID,
-        PLUGIN.getI18nName(),
-        PLUGIN.MINIMUM_LICENSE_REQUIRED
-      );
-    },
   });
 }