add minikube bootcamp image to registry

config/jobs/image-pushing/k8s-staging-minikube.yaml

@@ -0,0 +1,24 @@
+postsubmits:
+  kubernetes/minikube:
+    - name: post-kubernetes-bootcamp-image
+      cluster: k8s-infra-prow-build-trusted
+      annotations:
+        testgrid-dashboards: minikube-periodics, sig-k8s-infra-gcb
+      decorate: true
+      branches:
+        - ^master$
+      spec:
+        serviceAccountName: gcb-builder
+        containers:
+          - image: gcr.io/k8s-staging-test-infra/image-builder:v20250914-3092127382
+            command:
+              - /run.sh
+            args:
+              - --project=k8s-staging-images
+              - --scratch-bucket=gs://k8s-staging-images-gcb
+              - --env-passthrough=PULL_BASE_REF
+              - --gcb-config=hack/prow/image/kubernetes-bootcamp/cloudbuild.yaml
+              - .
+            env:
+              - name: LOG_TO_STDOUT
+                value: "y"