fix: ape plugins list bad auth and unnecessary requests

[antazoey]

What I did

fixes: #2363

Two things

1. Avoid requesting anything from GH during ape plugins list (unless --all) is given. There is no need!
   This is a performance boost as well:

Before:

ape plugins list  2.87s user 0.32s system 74% cpu 4.299 total

After:

ape plugins list  1.49s user 0.20s system 99% cpu 1.700 total

2. When receiving a 401 from bad auth in GH client, retry request w/o auth, as it likely will still work. Also, let the user know via a log warning.

How to verify it

export GITHUB_ACCESS_TOKEN="poop"
ape plugins list
ape plugins list --all

The first ape plugins list should be fine - no requests to GH are even made anywhere and it is faster.
The second request should still work! Only you get a warning now about your bad auth.

Checklist

• All changes are completed
• New test cases have been added
• Documentation has been updated