Move EE differences for `app/assets/javascripts/pages/groups/issues/index.js`

The file `` has differences between CE and EE.

Diferences

diff --git a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/pages/groups/issues/index.js b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/pages/groups/issues/index.js
index 736c6a62610..1fa163bb2d1 100644
--- a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/pages/groups/issues/index.js
+++ b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/pages/groups/issues/index.js
@@ -1,13 +1,13 @@
 import projectSelect from '~/project_select';
 import initFilteredSearch from '~/pages/search/init_filtered_search';
 import { FILTERED_SEARCH } from '~/pages/constants';
-import IssuableFilteredSearchTokenKeys from '~/filtered_search/issuable_filtered_search_token_keys';
+import IssuesFilteredSearchTokenKeysEE from 'ee/filtered_search/issues_filtered_search_token_keys';
 
 document.addEventListener('DOMContentLoaded', () => {
   initFilteredSearch({
     page: FILTERED_SEARCH.ISSUES,
     isGroupDecendent: true,
-    filteredSearchTokenKeys: IssuableFilteredSearchTokenKeys,
+    filteredSearchTokenKeys: IssuesFilteredSearchTokenKeysEE,
   });
   projectSelect();
 });

What needs to be done

1. Use ee_else_ce to import the mixin into this file.