cluster/gce/gci/credential-provider: add barebones GCP credential provider for testing only

Signed-off-by: Andrew Sy Kim <andrewsy@google.com>
Co-authored-by: Aditi Sharma <adi.sky17@gmail.com>

test/e2e_node/remote/node_e2e.go

@@ -106,10 +106,10 @@ func prependMemcgNotificationFlag(args string) string {
 // a credential provider plugin.
 func prependGCPCredentialProviderFlag(args, workspace string) string {
 	credentialProviderConfig := filepath.Join(workspace, "credential-provider.yaml")
-	disableIntreeCredentialProviderFlag := "--kubelet-flags=--feature-gates=DisableKubeletCloudCredentialProviders=true"
+	featureGateFlag := "--kubelet-flags=--feature-gates=DisableKubeletCloudCredentialProviders=true,KubeletCredentialProviders=true"
 	configFlag := fmt.Sprintf("--kubelet-flags=--image-credential-provider-config=%s", credentialProviderConfig)
 	binFlag := fmt.Sprintf("--kubelet-flags=--image-credential-provider-bin-dir=%s", workspace)
-	return fmt.Sprintf("%s %s %s %s", disableIntreeCredentialProviderFlag, configFlag, binFlag, args)
+	return fmt.Sprintf("%s %s %s %s", featureGateFlag, configFlag, binFlag, args)
 }
 
 // osSpecificActions takes OS specific actions required for the node tests

test/e2e_node/remote/utils.go

@@ -56,6 +56,8 @@ providers:
     matchImages:
     - "gcr.io"
     - "*.gcr.io"
+    - "container.cloud.google.com"
+    - "*.pkg.dev"
     defaultCacheDuration: 1m`
 
 // Install the cni plugin and add basic bridge configuration to the