[Backport] Fix `vtctldclient`'s Root command to return an error on unknown command (#12481)#12531

Merged

ajm188 merged 1 commit intovitessio:release-15.0from planetscale:andrew/bp-12481-to-15

Mar 1, 2023

+76

Commits on Mar 1, 2023

Fix vtctldclient's Root command to return an error on unknown command (vitessio#12481 )
Andrew Mason
committed