Match the workflow triggering to oci.yaml

But also add a concurrency group to serialize runs

Author: HoloRin

.github/workflows/rabbitmq_peer_discovery_aws.yaml

@@ -1,6 +1,14 @@
 name: Peer Discovery AWS Integration Test
 on:
+  push:
+    paths-ignore:
+      - '.github/workflows/secondary-umbrella.yaml'
+      - '.github/workflows/update-elixir-patches.yaml'
+      - '.github/workflows/update-otp-patches.yaml'
   workflow_dispatch:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name }}
+  cancel-in-progress: true
 jobs:
   peer-discovery-aws-integration-test:
     name: Integration Test