Added push step to cloudbuild.yaml and replaced quay repository with gcr.io repo

Author: aarongalang

Diff for: Makefile

@@ -28,5 +28,5 @@ release-tools/build.make:
 
 include release-tools/build.make
 
-REGISTRY_NAME=quay.io/containerobjectstorage
+REGISTRY_NAME=gcr.io/k8s-staging-sig-storage/objectstorage-sidecar
 IMAGE_TAGS=canary

Diff for: cloudbuild.yaml

@@ -5,5 +5,7 @@ options:
 steps:
 - name: "gcr.io/k8s-testimages/gcb-docker-gcloud:v20200824-5d057db"
   entrypoint: make
-  args:
-  - build
+  args: ['build']
+- name: "gcr.io/k8s-testimages/gcb-docker-gcloud:v20200824-5d057db"
+  entrypoint: make
+  args: ['push']