Handle auto-rebase actions in CI table

.github/workflows/engine-tests-report.yml

@@ -42,6 +42,23 @@ jobs:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           run-id: ${{ github.event.workflow_run.id }}
 
+      - name: Download PR number
+        uses: actions/download-artifact@v8
+        with:
+          name: pr_number.txt
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          run-id: ${{ github.event.workflow_run.id }}
+
+      - name: Read PR number
+        id: pr
+        run: |
+          PR_NUMBER="$(head pr_number.txt -n1)"
+          if [[ ! "$PR_NUMBER" =~ ^[1-9][0-9]*$ ]]; then
+            echo "Unexpected contents of pr_number.txt: $PR_NUMBER"
+            exit 1
+          fi
+          echo "number=$PR_NUMBER" >> "$GITHUB_OUTPUT"
+
       - name: Check for results
         id: check
         run: |
@@ -63,4 +80,4 @@ jobs:
         with:
           path: comment-body.txt
           header: test262-engine-results
-          number: ${{ github.event.workflow_run.pull_requests[0].number }}
+          number: ${{ steps.pr.outputs.number }}

.github/workflows/engine-tests.yml

@@ -5,7 +5,7 @@ on:
 
 jobs:
   changed-tests:
-    name: Identify changed tests
+    name: Prepare engine tests run
     runs-on: ubuntu-latest
     outputs:
       any_changed: ${{ steps.changed.outputs.any_changed }}
@@ -20,6 +20,15 @@ jobs:
         with:
           files: test/
 
+      - name: Record PR number
+        run: echo "${{ github.event.number }}" > pr_number.txt
+
+      - name: Upload PR number
+        uses: actions/upload-artifact@v7
+        with:
+          path: pr_number.txt
+          archive: false
+
   # Future work:
   # - Run each step of the matrix on main as well, and indicate in the table
   #   whether a test moved from passing to failing or vice versa