[Image Embeddable] Use client-side authc.getCurrentUser from core.sec…

…urity (#186917)

Part of #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 Image Embeddable plugin uses the
`authc.getCurrentUser` method as a means to allow the user to delete
image files that are attributed to them.

### 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

src/plugins/image_embeddable/public/components/image_editor/open_image_editor.tsx

@@ -14,7 +14,7 @@ import { FilesContext } from '@kbn/shared-ux-file-context';
 
 import { ImageConfig } from '../../image_embeddable/types';
 import { FileImageMetadata, imageEmbeddableFileKind } from '../../imports';
-import { coreServices, filesService, securityService } from '../../services/kibana_services';
+import { coreServices, filesService } from '../../services/kibana_services';
 import { createValidateUrl } from '../../utils/validate_url';
 import { ImageViewerContext } from '../image_viewer/image_viewer_context';
 
@@ -27,8 +27,8 @@ export const openImageEditor = async ({
 }): Promise<ImageConfig> => {
   const { ImageEditorFlyout } = await import('./image_editor_flyout');
 
-  const { overlays, theme, i18n, http } = coreServices;
-  const user = securityService ? await securityService.authc.getCurrentUser() : undefined;
+  const { overlays, theme, i18n, http, security } = coreServices;
+  const user = await security.authc.getCurrentUser();
   const filesClient = filesService.filesClientFactory.asUnscoped<FileImageMetadata>();
 
   /**

src/plugins/image_embeddable/public/services/kibana_services.ts

@@ -11,7 +11,6 @@ import { BehaviorSubject } from 'rxjs';
 import { CoreStart } from '@kbn/core/public';
 import { FilesStart } from '@kbn/files-plugin/public';
 import { ScreenshotModePluginStart } from '@kbn/screenshot-mode-plugin/public';
-import { SecurityPluginStart } from '@kbn/security-plugin-types-public';
 import { UiActionsStart } from '@kbn/ui-actions-plugin/public';
 
 import { ImageEmbeddableStartDependencies } from '../plugin';
@@ -20,7 +19,6 @@ export let coreServices: CoreStart;
 export let filesService: FilesStart;
 export let uiActionsService: UiActionsStart;
 export let screenshotModeService: ScreenshotModePluginStart | undefined;
-export let securityService: SecurityPluginStart | undefined;
 
 export let trackUiMetric: (
   type: string,
@@ -48,7 +46,6 @@ export const setKibanaServices = (
 ) => {
   coreServices = kibanaCore;
   filesService = deps.files;
-  securityService = deps.security;
   uiActionsService = deps.uiActions;
   screenshotModeService = deps.screenshotMode;
 

src/plugins/image_embeddable/tsconfig.json

@@ -23,7 +23,6 @@
     "@kbn/presentation-containers",
     "@kbn/presentation-publishing",
     "@kbn/react-kibana-mount",
-    "@kbn/security-plugin-types-public",
     "@kbn/embeddable-enhanced-plugin"
   ],
   "exclude": ["target/**/*"]