Use ee_else_ce in filtered_search_manager_spec.js

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/47104

spec/frontend/filtered_search/filtered_search_manager_spec.js

+import FilteredSearchManager from 'ee_else_ce/filtered_search/filtered_search_manager';
+
 import RecentSearchesService from '~/filtered_search/services/recent_searches_service';
 import RecentSearchesServiceError from '~/filtered_search/services/recent_searches_service_error';
 import RecentSearchesRoot from '~/filtered_search/recent_searches_root';
@@ -5,7 +7,6 @@ import IssuableFilteredSearchTokenKeys from '~/filtered_search/issuable_filtered
 import DropdownUtils from '~/filtered_search/dropdown_utils';
 import FilteredSearchVisualTokens from '~/filtered_search/filtered_search_visual_tokens';
 import FilteredSearchDropdownManager from '~/filtered_search/filtered_search_dropdown_manager';
-import FilteredSearchManager from '~/filtered_search/filtered_search_manager';
 import FilteredSearchSpecHelper from '../helpers/filtered_search_spec_helper';
 import { BACKSPACE_KEY_CODE, DELETE_KEY_CODE } from '~/lib/utils/keycodes';
 import { visitUrl } from '~/lib/utils/url_utility';