chore: rollback changes to cloudbuild file

Signed-off-by: Richard Case <[email protected]>

cloudbuild.yaml

@@ -2,16 +2,15 @@
 timeout: 3000s
 options:
   substitution_option: ALLOW_LOOSE
-  machineType: 'E2_HIGHCPU_8'
 steps:
-  - name: 'gcr.io/k8s-staging-test-infra/gcb-docker-gcloud:v20230522-312425ae46'
+  - name: 'gcr.io/k8s-staging-test-infra/gcb-docker-gcloud:v20220609-2e4c91eb7e'
     entrypoint: make
     env:
     - DOCKER_CLI_EXPERIMENTAL=enabled
     - TAG=$_GIT_TAG
     - PULL_BASE_REF=$_PULL_BASE_REF
-    - DOCKER_BUILDKIT=1
-    args: ['release-staging', '-j', '8', '-O']
+    args:
+    - release-staging
 substitutions:
   # _GIT_TAG will be filled with a git-based tag for the image, of the form vYYYYMMDD-hash, and
   # can be used as a substitution