Support `dired-do-shell-command' into tramp /gdrive method?

[Tino Calancha]

Hi Michael,

is there a plan to add more features to the /gdrive tramp method?
I am trying it today for the first time.

I observe that I can:
* mark files (m)
* create(+)/delete (D) a directory
* delete a file (D)

Apparently `dired-do-shell-command' is not handled, for instance:

> From the /gdrive dired buffer, I cannot move FILE into DIR:
! mv ? DIR