Migrate ide edit dropdown button

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/43403

app/assets/javascripts/ide/components/editor_mode_dropdown.vue

 <script>
+import { GlButton } from '@gitlab/ui';
 import { __, sprintf } from '~/locale';
 import { viewerTypes } from '../constants';
 
 export default {
+  components: {
+    GlButton,
+  },
   props: {
     viewer: {
       type: String,
@@ -31,7 +35,7 @@ export default {
 
 <template>
   <div class="dropdown">
-    <button type="button" class="btn btn-link" data-toggle="dropdown">{{ __('Edit') }}</button>
+    <gl-button variant="link" data-toggle="dropdown">{{ __('Edit') }}</gl-button>
     <div class="dropdown-menu dropdown-menu-selectable dropdown-open-left">
       <ul>
         <li>

app/assets/stylesheets/page_bundles/_ide_theme_overrides.scss

@@ -6,9 +6,10 @@
   $bs-input-focus-box-shadow: rgba(0, 123, 255, 0.25);
 
   a:not(.btn),
-  .btn-link:hover,
-  .btn-link:focus,
-  .btn-link:active {
+  .gl-button.btn-link,
+  .gl-button.btn-link:hover,
+  .gl-button.btn-link:focus,
+  .gl-button.btn-link:active {
     color: var(--ide-link-color, $blue-600);
   }
 

changelogs/unreleased/229284-migrate-bootstrap-button-to-gitlab-ui-glbutton-in-app-assets-javas.yml

+---
+title: Update IDE compare changes view button to link style
+merge_request: 43403
+author:
+type: other