[Maps] Use client-side authc.getCurrentUser from core.security (#186915)

Part of https://github.com/elastic/kibana/issues/186574

Background: This PR serves as an example of a plugin migrating away from
depending on the Security plugin, which is a high priority effort for
the last release before 9.0. The Maps plugin uses the
`authc.getCurrentUser` in the `es_search_source` utility.

### Checklist

Delete any items that are not applicable to this PR.

- [ ] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

x-pack/plugins/maps/public/classes/sources/es_search_source/es_search_source.tsx

@@ -19,12 +19,7 @@ import { Adapters } from '@kbn/inspector-plugin/common/adapters';
 import { SortDirection, SortDirectionNumeric } from '@kbn/data-plugin/common';
 import { getTileUrlParams } from '@kbn/maps-vector-tile-utils';
 import { AbstractESSource } from '../es_source';
-import {
-  getHttp,
-  getSearchService,
-  getSecurityService,
-  getTimeFilter,
-} from '../../../kibana_services';
+import { getCore, getHttp, getSearchService, getTimeFilter } from '../../../kibana_services';
 import {
   addFieldToDSL,
   getField,
@@ -532,7 +527,7 @@ export class ESSearchSource extends AbstractESSource implements IMvtVectorSource
     if (!(await this._isDrawingIndex())) {
       return {};
     }
-    const user = await getSecurityService()?.authc.getCurrentUser();
+    const user = await getCore().security.authc.getCurrentUser();
     const timestamp = new Date().toISOString();
     return {
       created: {

x-pack/plugins/maps/public/kibana_services.ts

@@ -90,7 +90,6 @@ export const getUrlForApp = () => coreStart.application.getUrlForApp;
 export const getNavigateToUrl = () => coreStart.application.navigateToUrl;
 export const getSavedObjectsTagging = () => pluginsStart.savedObjectsTagging;
 export const getPresentationUtilContext = () => pluginsStart.presentationUtil.ContextProvider;
-export const getSecurityService = () => pluginsStart.security;
 export const getSpacesApi = () => pluginsStart.spaces;
 export const getTheme = () => coreStart.theme;
 export const getApplication = () => coreStart.application;

x-pack/plugins/maps/public/plugin.ts

@@ -36,7 +36,6 @@ import type { FileUploadPluginStart } from '@kbn/file-upload-plugin/public';
 import type { PresentationUtilPluginStart } from '@kbn/presentation-util-plugin/public';
 import type { SavedObjectTaggingPluginStart } from '@kbn/saved-objects-tagging-plugin/public';
 import type { ChartsPluginStart } from '@kbn/charts-plugin/public';
-import type { SecurityPluginStart } from '@kbn/security-plugin/public';
 import type { SpacesPluginStart } from '@kbn/spaces-plugin/public';
 import type { CloudSetup } from '@kbn/cloud-plugin/public';
 import type { LensPublicSetup } from '@kbn/lens-plugin/public';
@@ -123,7 +122,6 @@ export interface MapsPluginStartDependencies {
   visualizations: VisualizationsStart;
   savedObjectsTagging?: SavedObjectTaggingPluginStart;
   presentationUtil: PresentationUtilPluginStart;
-  security?: SecurityPluginStart;
   spaces?: SpacesPluginStart;
   mapsEms: MapsEmsPluginPublicStart;
   contentManagement: ContentManagementPublicStart;