Keyring generate command does not output anything on command execution

[AndrewSisley]

There is no indication of what it did (if anything). Executing defradb keyring generate prompts for password and that is it. Entering different random password strings still does not produce any output to the terminal (password appears to be key specific, but that is not documented in user-space).

Executing defradb keyring generate --keyring-backend system does not prompt for password, and does not output anything.

defradb keyring import also has the same problem, however given the explicitness of that command it is slight less important.

Flagging as a bug, as I don't know what it is doing and whether it is correct or not. This issue is worsened quite a lot by #2757.

Tested on Linux Mint, GNOME Terminal.