[Drift] Revert adding Chat to Management (#159896)

## Summary

Partially revert https://github.com/elastic/kibana/pull/159121
Reverts adding Drift chat to management. Part of
https://github.com/elastic/kibana/issues/158835

We decided to revert to adding to management for now because we realized
that there are a lot of cases in the Management app when Drift Chat can
overlap buttons on the page 😢

Here are some examples: 

<img width="600" alt="Screenshot 2023-06-15 at 16 20 43"
src="980916dc-b463-45f4-b5c1-bdce9f3f8336">
<img width="600" alt="Screenshot 2023-06-15 at 16 20 43"
src="ec74332b-5c91-4175-bde6-8e736d8bb4fa">
<img width="600" alt="Screenshot 2023-06-15 at 16 20 50"
src="5753b05d-7abc-409f-9a06-9f19a910461a">

src/plugins/management/kibana.jsonc

@@ -10,8 +10,7 @@
       "share"
     ],
     "optionalPlugins": [
-      "home",
-      "cloudChatProvider"
+      "home"
     ],
     "requiredBundles": [
       "kibanaReact",

src/plugins/management/public/components/management_app/management_app.tsx

@@ -16,7 +16,6 @@ import { AppMountParameters, ChromeBreadcrumb, ScopedHistory } from '@kbn/core/p
 
 import { reactRouterNavigate, KibanaThemeProvider } from '@kbn/kibana-react-plugin/public';
 import { KibanaPageTemplate, KibanaPageTemplateProps } from '@kbn/shared-ux-page-kibana-template';
-import type { CloudChatProviderPluginStart } from '@kbn/cloud-chat-provider-plugin/public';
 import useObservable from 'react-use/lib/useObservable';
 import {
   ManagementSection,
@@ -39,11 +38,10 @@ export interface ManagementAppDependencies {
   kibanaVersion: string;
   setBreadcrumbs: (newBreadcrumbs: ChromeBreadcrumb[]) => void;
   isSidebarEnabled$: BehaviorSubject<boolean>;
-  cloudChat?: CloudChatProviderPluginStart;
 }
 
 export const ManagementApp = ({ dependencies, history, theme$ }: ManagementAppProps) => {
-  const { setBreadcrumbs, isSidebarEnabled$, cloudChat } = dependencies;
+  const { setBreadcrumbs, isSidebarEnabled$ } = dependencies;
   const [selectedId, setSelectedId] = useState<string>('');
   const [sections, setSections] = useState<ManagementSection[]>();
   const isSidebarEnabled = useObservable(isSidebarEnabled$);
@@ -116,7 +114,6 @@ export const ManagementApp = ({ dependencies, history, theme$ }: ManagementAppPr
             dependencies={dependencies}
           />
         </KibanaPageTemplate>
-        {cloudChat?.Chat ? <cloudChat.Chat /> : null}
       </KibanaThemeProvider>
     </I18nProvider>
   );

src/plugins/management/public/plugin.ts

@@ -10,7 +10,6 @@ import { i18n } from '@kbn/i18n';
 import { BehaviorSubject } from 'rxjs';
 import type { SharePluginSetup, SharePluginStart } from '@kbn/share-plugin/public';
 import { HomePublicPluginSetup } from '@kbn/home-plugin/public';
-import { CloudChatProviderPluginStart } from '@kbn/cloud-chat-provider-plugin/public';
 import {
   CoreSetup,
   CoreStart,
@@ -40,7 +39,6 @@ interface ManagementSetupDependencies {
 
 interface ManagementStartDependencies {
   share: SharePluginStart;
-  cloudChatProvider?: CloudChatProviderPluginStart;
 }
 
 export class ManagementPlugin
@@ -113,14 +111,13 @@ export class ManagementPlugin
       updater$: this.appUpdater,
       async mount(params: AppMountParameters) {
         const { renderApp } = await import('./application');
-        const [coreStart, plugins] = await core.getStartServices();
+        const [coreStart] = await core.getStartServices();
 
         return renderApp(params, {
           sections: getSectionsServiceStartPrivate(),
           kibanaVersion,
           setBreadcrumbs: coreStart.chrome.setBreadcrumbs,
           isSidebarEnabled$: managementPlugin.isSidebarEnabled$,
-          cloudChat: plugins.cloudChatProvider,
         });
       },
     });

src/plugins/management/tsconfig.json

@@ -19,8 +19,7 @@
     "@kbn/i18n",
     "@kbn/i18n-react",
     "@kbn/shared-ux-page-kibana-template",
-    "@kbn/shared-ux-router",
-    "@kbn/cloud-chat-provider-plugin",
+    "@kbn/shared-ux-router"
   ],
   "exclude": [
     "target/**/*",

x-pack/test/cloud_integration/tests/chat.ts

@@ -36,16 +36,6 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
       await testSubjects.existOrFail('cloud-chat');
     });
 
-    it('chat widget is present on management page', async () => {
-      await PageObjects.common.navigateToApp('management');
-      await testSubjects.existOrFail('cloud-chat');
-    });
-
-    it('chat widget is present on management page', async () => {
-      PageObjects.common.navigateToApp('management');
-      await testSubjects.existOrFail('cloud-chat');
-    });
-
     it('chat widget is present on observability/overview page', async () => {
       await PageObjects.common.navigateToUrl('observability', '/overview', {
         useActualUrl: true,