Alerting: Github Action to update alerting module (#100999)

.github/CODEOWNERS

@@ -757,6 +757,7 @@ embed.go @grafana/grafana-as-code
 /.github/workflows/add-to-whats-new.yml @grafana/docs-tooling
 /.github/workflows/auto-triager/ @grafana/plugins-platform-frontend
 /.github/workflows/alerting-swagger-gen.yml @grafana/alerting-backend
+/.github/workflows/alerting-update-module.yml @grafana/alerting-backend
 /.github/workflows/auto-milestone.yml @grafana/grafana-developer-enablement-squad
 /.github/workflows/backport.yml @grafana/grafana-developer-enablement-squad
 /.github/workflows/bump-version.yml @grafana/grafana-developer-enablement-squad