cloudbuild: Publish preprod image to Artifact Registry (#58)

Author: sergiitk

tools/cloudbuild-artifacts.yaml

@@ -20,12 +20,12 @@ steps:
 - name: alpine
   args: ['./tools/package.sh', '$COMMIT_SHA']
 - name: gcr.io/cloud-builders/docker
-  args: [ 'build', '-t', 'gcr.io/grpc-testing/td-grpc-bootstrap:${COMMIT_SHA}', '.' ]
+  args: [ 'build', '-t', 'us-docker.pkg.dev/grpc-testing/trafficdirector/td-grpc-bootstrap:${COMMIT_SHA}', '.' ]
 options:
   env:
   - CGO_ENABLED=0
 artifacts:
   objects:
     location: 'gs://grpc-td-builds/td-grpc-bootstrap/'
     paths: ['td-grpc-bootstrap-${COMMIT_SHA}.tar.gz']
-images: ['gcr.io/grpc-testing/td-grpc-bootstrap:${COMMIT_SHA}']
+images: ['us-docker.pkg.dev/grpc-testing/trafficdirector/td-grpc-bootstrap:${COMMIT_SHA}']