Merge pull request #12314 from backstage/mob/pr

Use the custom PR action

.github/workflows/pr.yaml

@@ -0,0 +1,14 @@
+name: PR
+on:
+  pull_request_target:
+
+jobs:
+  generate-changeset:
+    runs-on: ubuntu-latest
+
+    if: github.repository == 'backstage/backstage'
+    steps:
+      - name: PR sync
+        uses: backstage/actions/pr-sync@v0.1.6
+        with:
+          github-token: ${{ secrets.GH_SERVICE_ACCOUNT_TOKEN }}

.github/workflows/sync_approve_renovate_pr.yaml

@@ -1,37 +0,0 @@
-name: Approve renovate lock file changes
-on:
-  pull_request_target:
-    paths:
-      - '.github/workflows/sync_renovate-changesets.yml'
-      - '**/yarn.lock'
-
-jobs:
-  generate-changeset:
-    runs-on: ubuntu-latest
-    if: github.actor == 'renovate[bot]' && github.repository == 'backstage/backstage'
-    steps:
-      - name: Approve
-        uses: actions/github-script@v6
-        with:
-          github-token: ${{ secrets.GH_SERVICE_ACCOUNT_TOKEN }}
-          script: |
-            const owner = 'backstage';
-            const repo = 'backstage';
-
-            const r = await github.rest.pulls.listFiles({
-              owner,
-              repo,
-              pull_number: context.issue.number,
-            });
-
-            if (r.data.some((f) => f.filename.split('/').slice(-1)[0] !== 'yarn.lock')) {
-              console.log('skipping approval since some files are not yarn.lock');
-              return;
-            }
-
-            await github.rest.pulls.createReview({
-              owner,
-              repo,
-              pull_number: context.issue.number,
-              event: 'APPROVE'
-            })