[Workflows] Failing workflows: 'Check code formatting' and 'Comment on an issue'

[Sirraide]

I was told to open an issue for failing workflows last time it happened, so I’ve got some more this time:

• This one failing probably makes sense because I forgot to reformat, but maybe it’s relevant:
  https://github.com/llvm/llvm-project/actions/runs/8632565798

• This one seems to have timed out after 6 hours?
  https://github.com/llvm/llvm-project/actions/runs/8628525844

• This one failed trying download something, apparently.
  https://github.com/llvm/llvm-project/actions/runs/8633310637

It may help to know that I got emails about these three shortly after pushing a commit (to this pr: #86526), noticing that I had forgotten to clang-format the changes, and then pushing another commit that fixed the formatting a minute or so later.

CC @tstellar @boomanaiden154

[boomanaiden154]

1. The first one is expected. The job is supposed to fail if there are formatting issues.
2. That is [Github] Check code formatting sometimes gets stuck on checking out merge base #79661. Switching to pull_request should work, I just need to do it. It happens rarely, but still a couple times per day.
3. Not sure about this one. Will need to do some more investigation.