Images: Rework. (1/3) (#13014)

Co-authored-by: Marco Ebert <marco_ebert@icloud.com>

images/nginx/cloudbuild.yaml

@@ -4,11 +4,9 @@ options:
   # Ignore Prow provided substitutions.
   substitution_option: ALLOW_LOOSE
 steps:
-  - name: gcr.io/k8s-staging-test-infra/gcb-docker-gcloud:v20250116-2a05ea7e3d
-    env:
-      - REGISTRY=us-central1-docker.pkg.dev/k8s-staging-images/ingress-nginx
-    entrypoint: bash
-    args:
-      - -c
-      - gcloud auth configure-docker && cd images/nginx && make push
+- name: gcr.io/cloud-builders/docker
+  dir: images/nginx
+  entrypoint: make
+  args:
+  - push
 timeout: 7200s