[llvm] [workflows] Always pull code-format-helper.py from the main branch (PR #80495)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

Wouldn't any PR that has an updated version of `.github/works/pr-code-format.yml` (so is actually running the code formatting job) also have an updated version of the python script, assuming they were both modified in the same commit?

https://github.com/llvm/llvm-project/pull/80495