Merge branch '218570-not-filter-operator-does-not-work-for-several-filters-2' into 'master'

Remove the option from to search for approver !=

See merge request gitlab-org/gitlab!56310

ee/app/assets/javascripts/filtered_search/add_extra_tokens_for_merge_requests.js

@@ -36,6 +36,7 @@ const approvers = {
     symbol: '@',
     icon: 'approval',
     tag: '@approver',
+    hideNotEqual: true,
   },
   tokenAlternative: {
     formattedKey: __('Approver'),