MGMT-17095: Disable local cluster import

There have been several reported issues with this feature and we need to look at this further.
To unblock the ACM release, we are disabling the feature.

cmd/main.go

@@ -162,7 +162,7 @@ var Options struct {
 	AllowConvergedFlow                   bool          `envconfig:"ALLOW_CONVERGED_FLOW" default:"true"`
 	PreprovisioningImageControllerConfig controllers.PreprovisioningImageControllerConfig
 	BMACConfig                           controllers.BMACConfig
-	EnableLocalClusterImport             bool   `envconfig:"ENABLE_LOCAL_CLUSTER_IMPORT" default:"true"`
+	EnableLocalClusterImport             bool   `envconfig:"ENABLE_LOCAL_CLUSTER_IMPORT" default:"false"`
 	LocalClusterImportNamespace          string `envconfig:"LOCAL_CLUSTER_IMPORT_NAMESPACE" default:"local-cluster"`
 
 	// Directory containing pre-generated TLS certs/keys for the ephemeral installer