[IT-3523] Run the deploy pipeline on test branches

Upload test artifacts for branches that start with `test/` to the
'itsandbox' account. This automates a manual step needed for testing
changes to AMIs used by service catalog products.

Author: ConsoleCatzirl

.github/workflows/deploy.yaml

@@ -20,7 +20,7 @@ jobs:
   deploy:
     name: Upload to Amazon S3
     runs-on: ubuntu-latest
-    if: ${{ github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v') }}
+    if: ${{ github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/test/') || startsWith(github.ref, 'refs/tags/v') }}
     needs: [ "validate" ]
     permissions:
       id-token: write