Deploy SQL schema from Cloud Build (#350)

Defined Docker image for schema deployment.

Included schema deploymer docker in the Cloud Build release process.

Defined Cloud Build config for schema deployment.

TESTED=Used cloud-build-local to test deployment flow
TESTED=Used docker to test schema deployer image in more ways

release/cloudbuild-deploy.yaml

@@ -48,7 +48,7 @@ steps:
   - deploy_invoicing_pipeline
 # Save the deployed tag for the current environment on GCS. Because of b/137891685
 # which causes the for-loop in the next step to fail, this may not be the last step.
-# TODO(weiminyu): do this in last step, and use 'artifacts' section to upload the tag.
+# TODO(weiminyu): do this in last step.
 - name: 'gcr.io/${PROJECT_ID}/builder:latest'
   entrypoint: /bin/bash
   args:
@@ -56,7 +56,7 @@ steps:
   - |
     set -e
     echo ${TAG_NAME} | \
-      gsutil cp - gs://${PROJECT_ID}-deploy/deployed_tags/nomulus.${_ENV}.tag
+      gsutil cp - gs://${PROJECT_ID}-deployed-tags/nomulus.${_ENV}.tag
 # Deploy the GAE config files.
 # First authorize the gcloud tool to use the credential json file, then
 # download and unzip the tarball that contains the relevant config files