Repo File Sync: ClangPDB CI workflow updates (#1396)

synced local file(s) with
[microsoft/mu_devops](https://github.com/microsoft/mu_devops).

🤖: View the [Repo File Sync Configuration
File](https://github.com/microsoft/mu_devops/blob/main/.sync/Files.yml)
to see how files are synced.



---

This PR was created automatically by the
[repo-file-sync-action](https://github.com/BetaHuhn/repo-file-sync-action)
workflow run
[#24354454229](https://github.com/microsoft/mu_devops/actions/runs/24354454229)

Signed-off-by: Project Mu UEFI Bot <uefibot@microsoft.com>
Co-authored-by: mu-automation[bot] <204385837+mu-automation[bot]@users.noreply.github.com>

Author: mu-automation[bot]

.github/workflows/clangpdb-ci.yml

@@ -25,6 +25,11 @@ on:
     branches:
       - main
 
+concurrency:
+  group: clangpdb-package-ci-${{ github.ref }}
+
+  cancel-in-progress: true
+
 jobs:
   package-matrix:
     name: Gather Repository Packages
@@ -69,3 +74,24 @@ jobs:
       python-version: "3.12"
       package-config: ${{ needs.package-matrix.outputs.matrix }}
 
+
+  final:
+    name: Collapse Results
+    if: ${{ always() }}
+
+    needs: [ubuntu-ci, windows-ci]
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Check Matrix Jobs Results
+        run: |
+          echo "Ubuntu CI result: ${{ needs.ubuntu-ci.result }}"
+          echo "Windows CI result: ${{ needs.windows-ci.result }}"
+          
+          if [[ "${{ needs.ubuntu-ci.result }}" == "failure" || "${{ needs.windows-ci.result }}" == "failure" ]]; then
+            echo "One or more CI jobs failed"
+            exit 1
+          else
+            echo "All ubuntu and windows CI matrix jobs completed successfully"
+          fi
+