Merge pull request #69892 from phlogistonjohn/jjm-teuth-remotectl

smb: add a teuthology test that exercises the gRPC over TCP interface of smb remote-control

Reviewed-by: Avan Thakkar <athakkar@redhat.com>
Reviewed-by: Rabinarayan Panigrahi <rapanigr@redhat.com>