[llvm] [Github] Add labels on pull requests based on paths. (PR #65308)

[Tom Stellard via llvm-commits]

https://github.com/tstellar commented:

Is there some way we can pull all the path information from the CODEOWNERS file?  It doesn't seem great to have this information duplicated in two places.

https://github.com/llvm/llvm-project/pull/65308