Replace deprecated buttons on epic detail view

app/assets/javascripts/notes/components/comment_form.vue

@@ -412,7 +412,7 @@ export default {
                 :text="commentButtonTitle"
                 class="gl-mr-3 js-comment-button js-comment-submit-button comment-type-dropdown"
                 category="primary"
-                variant="success"
+                variant="confirm"
                 :disabled="disableSubmitButton"
                 data-testid="comment-button"
                 data-qa-selector="comment_button"

app/assets/javascripts/sidebar/components/confidential/sidebar_confidentiality_form.vue

@@ -121,7 +121,7 @@ export default {
           </gl-button>
           <gl-button
             category="secondary"
-            variant="warning"
+            variant="confirm"
             :disabled="loading"
             :loading="loading"
             data-testid="confidential-toggle"

changelogs/unreleased/epic-detail-view-deprecated-button.yml

+---
+title: Replace deprecated buttons on epic detail view
+merge_request: 58152
+author:
+type: changed

ee/app/assets/javascripts/epic/components/epic_header.vue

@@ -127,7 +127,7 @@ export default {
         :loading="epicStatusChangeInProgress"
         :class="actionButtonClass"
         category="secondary"
-        variant="warning"
+        variant="default"
         class="gl-mt-3 gl-sm-mt-0! gl-w-full gl-sm-w-auto!"
         data-qa-selector="close_reopen_epic_button"
         data-testid="toggle-status-button"
@@ -139,7 +139,7 @@ export default {
         v-if="canCreate"
         :href="newEpicWebUrl"
         category="secondary"
-        variant="success"
+        variant="confirm"
         class="gl-mt-3 gl-sm-mt-0! gl-sm-ml-3 gl-w-full gl-sm-w-auto!"
         data-testid="new-epic-button"
       >