[llvm] [Workflow] Expand code-format-helper.py error reporting (PR #69686)

[Tobias Hieta via llvm-commits]

tru wrote:

Hi, thanks for the updates, they seem sane to me. It's a little tough to review since it has a lot of stylistic changes mixed in with the functional ones. I would like to know if we could split the PR up so it's easier to review.

https://github.com/llvm/llvm-project/pull/69686