Add --bare behavior to sync and clean

[jcrotts]

Implement some behavior for --bare in sync and clean, and add bare an option to do_clean in cli.py

The issue

#3041

The fix

Added logic for --bare to sync and clean since they are passed in as arguments.
Excluding error messages.

Also added --bare as a click option to clean.

The checklist

• Associated issue
• A news fragment in the news/ directory to describe this fix with the extension .bugfix, .feature, .behavior, .doc. .vendor. or .trivial (this will appear in the release changelog). Use semantic line breaks and name the file after the issue number or the PR #.

[uranusjr]

I only see it be added to clean? Also, a news fragment to describe the change would be nice.

[jcrotts]

--bare was an option for sync already in command.py, but I don't think it actually did anything.

Sure thing I'll add a fragment.

[uranusjr]

I see. Does the sync command’s --bare option have the intended behaviour now? Since this PR does not change sync, it might be better to only mention adding --bare to clean in the commit message and news fragment.

[jcrotts]

One change was made to sync that removes one output line (sync doesn't have much output either way). I can change the commit message and news fragment if you think it would be clearer.

[uranusjr]

It would be best to either 1) remove mention of sync from fragment, or 2) use sync’s bare option to reduce output. I am fine with either, your call. (And if you opt for 1), another PR on sync would be nice as well!)

[jcrotts]

Great I'll change the fragment to:

--bare now has an effect on clean, and sync's bare option is now used to reduce output.

Should I squash commits as well?

[uranusjr]

You don’t need to, I can squash on merge (but you can squash yourself as well, there’s no difference).