Enable AiO jobs to be cancelled at any given point during execution.

Author: markgoddard

.github/workflows/stackhpc-all-in-one.yml

@@ -290,3 +290,8 @@ jobs:
           OS_APPLICATION_CREDENTIAL_ID: ${{ secrets.OS_APPLICATION_CREDENTIAL_ID }}
           OS_APPLICATION_CREDENTIAL_SECRET: ${{ secrets.OS_APPLICATION_CREDENTIAL_SECRET }}
         if: always()
+
+      - name: Prune Docker images over 1 week old
+        # May fail if another prune is running
+        run: docker image prune --all --force --filter until=168h || true
+        if: always()