Removes all deprecated GlDeprecatedButtons buttons in the Releases page

app/assets/javascripts/releases/components/release_block_milestone_info.vue

@@ -3,7 +3,7 @@ import {
   GlProgressBar,
   GlLink,
   GlBadge,
-  GlDeprecatedButton,
+  GlButton,
   GlTooltipDirective,
   GlSprintf,
 } from '@gitlab/ui';
@@ -17,7 +17,7 @@ export default {
     GlProgressBar,
     GlLink,
     GlBadge,
-    GlDeprecatedButton,
+    GlButton,
     GlSprintf,
   },
   directives: {
@@ -134,13 +134,9 @@ export default {
             <span :key="'bullet-' + milestone.id" class="append-right-4">&bull;</span>
           </template>
           <template v-if="shouldRenderShowMoreLink(index)">
-            <gl-deprecated-button
-              :key="'more-button-' + milestone.id"
-              variant="link"
-              @click="toggleShowAll"
-            >
+            <gl-button :key="'more-button-' + milestone.id" variant="link" @click="toggleShowAll">
               {{ moreText }}
-            </gl-deprecated-button>
+            </gl-button>
           </template>
         </template>
       </div>

changelogs/unreleased/214242-remove-deprecated-buttons-in-release-page.yml

+---
+title: Updated deprecated buttons in release page
+merge_request: 30941
+author: Özgür Adem Işıklı @iozguradem
+type: added

spec/frontend/releases/components/release_block_milestone_info_spec.js

 import { mount } from '@vue/test-utils';
-import { GlProgressBar, GlLink, GlBadge, GlDeprecatedButton } from '@gitlab/ui';
+import { GlProgressBar, GlLink, GlBadge, GlButton } from '@gitlab/ui';
 import { trimText } from 'helpers/text_helper';
 import ReleaseBlockMilestoneInfo from '~/releases/components/release_block_milestone_info.vue';
 import { milestones as originalMilestones } from '../mock_data';
@@ -106,7 +106,7 @@ describe('Release block milestone info', () => {
 
     const clickShowMoreFewerButton = () => {
       milestoneListContainer()
-        .find(GlDeprecatedButton)
+        .find(GlButton)
         .trigger('click');
 
       return wrapper.vm.$nextTick();