docs(security): document gRPC interface as insecure for private use only (#45903)
Signed-off-by: jperezde <jperezde@redhat.com>
Signed-off-by: Russell Bryant <russell.bryant@gmail.com>
Co-authored-by: Russell Bryant <russell.bryant@gmail.com>
Co-authored-by: Russell Bryant <rbryant@redhat.com>