Merge branch '57744-fix-vue-warning-for-is-locked' into 'master'

Make sure isLocked passed to Vue is a boolean

Closes #57744

See merge request gitlab-org/gitlab-ce!25284

app/views/shared/issuable/_sidebar.html.haml

@@ -133,7 +133,7 @@
         #js-confidential-entry-point
 
       -# haml-lint:disable InlineJavaScript
-      %script#js-lock-issue-data{ type: "application/json" }= { is_locked: issuable_sidebar[:discussion_locked], is_editable: can_edit_issuable }.to_json.html_safe
+      %script#js-lock-issue-data{ type: "application/json" }= { is_locked: !!issuable_sidebar[:discussion_locked], is_editable: can_edit_issuable }.to_json.html_safe
       #js-lock-entry-point
 
       .js-sidebar-participants-entry-point