[Suggestion] Add --no-rm-home option to distrobox-rm

[awesomekyle]

Is your feature request related to a problem? Please describe.
When removing a container, there's no non-interactive way to specify not to remove a container's custom home. If you don't specify --rm-home, you get a prompt asking what to do, which defaults to N.

Describe the solution you'd like
I'd like the flag --no-rm-home to avoid any prompt when removing a container when I do want the custom home preserved.

Describe alternatives you've considered
An alternative would be to make --rm-home a boolean that could be set to 0: --rm-home=0

Additional context
This is closely related to #855