move label checker into same pipeline (#2597)

.github/workflows/pr_enforce_labels.yml

@@ -1,24 +0,0 @@
-name: Check PR Labels
-
-on:
-  pull_request:
-    types: [opened, edited, labeled, unlabeled, synchronize, reopened]
-
-permissions:
-  pull-requests: read
-  contents: read
-
-jobs:
-  check-label:
-    runs-on: ubuntu-24.04
-    steps:
-      - name: Check for PR labels
-        uses: actions/github-script@v7
-        with:
-          script: |
-            const labels = context.payload.pull_request.labels.map(label => label.name);
-            const requiredLabels = ['bugfix', 'enhancement', 'automation', 'dependencies', 'repo', 'release'];
-            const hasRequiredLabel = labels.some(label => requiredLabels.includes(label));
-            if (!hasRequiredLabel) {
-              core.setFailed(`PR must have at least one of the following labels before it can be merged: ${requiredLabels.join(', ')}.`);
-            }