Implement a config client shim that allows to intersect requests from a client and replace requests over static manifests with read-only operation over the manifests. The request replacement is no-op for object outside the of static manifest directory. In case a mutation request is required over static manifests, an error is returned.

The static manifests directory is pointed to through STATIC_CONFIG_MANIFEST_DIR environment variable. Currently only manifests from [infrastructure|network].config.openshift.io/v1 are supported as static manifests.