Merge branch 'fix-master-merge-train-helper' into 'master'

RUN AS-IF-FOSS Adding computed prop for FOSS merge trains

Closes #235980

See merge request gitlab-org/gitlab!39469

app/assets/javascripts/vue_merge_request_widget/mixins/ready_to_merge.js

@@ -32,5 +32,8 @@ export default {
     isMergeImmediatelyDangerous() {
       return false;
     },
+    shouldRenderMergeTrainHelperText() {
+      return false;
+    },
   },
 };