Merge branch 'err-tracking-save' into 'master'

Error tracking setting save button migration

Closes #219905

See merge request gitlab-org/gitlab!39154

app/assets/javascripts/error_tracking_settings/components/app.vue

 <script>
 import { mapActions, mapGetters, mapState } from 'vuex';
-import { GlDeprecatedButton as GlButton } from '@gitlab/ui';
+import { GlButton } from '@gitlab/ui';
 import ProjectDropdown from './project_dropdown.vue';
 import ErrorTrackingForm from './error_tracking_form.vue';
 

changelogs/unreleased/err-tracking-save.yml

+---
+title: Deprecated btn migration
+merge_request: 39154
+author:
+type: changed