[llvm] [Github] Add ability to filter jobs in job counting script (PR #82136)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

This also depends on https://github.com/PyGithub/PyGithub/pull/2902 (and probably them tagging a new release as well). Not sure exactly when that will happen.

https://github.com/llvm/llvm-project/pull/82136