Create filestore promotion for kubebuilder

Author: rikatz

Diff for: artifacts/filestores/k8s-staging-kubebuilder/filepromoter-manifest.yaml

@@ -0,0 +1,6 @@
+# google group for gcr.io/k8s-staging-kubebuilder is [email protected]
+filestores:
+- base: gs://k8s-staging-kubebuilder/releases/
+  src: true
+- base: gs://k8s-artifacts-prod/binaries/kubebuilder/
+  service-account: [email protected]

Diff for: artifacts/manifests/k8s-staging-kubebuilder/OWNERS

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+# See the OWNERS docs at https://go.k8s.io/owners
+# These OWNERS files should stay in sync:
+# https://github.com/kubernetes-sigs/kubebuilder/blob/master/OWNERS
+
+approvers:
+  - pwittrock
+  - camilamacedo86
+  - varshaprasad96