[llvm-branch-commits] [Utils] Add --use-gh-cli-token flag (PR #186695)

[Petr Hosek via llvm-branch-commits]

https://github.com/petrhosek approved this pull request.

The current implementation LGTM but I agree with @nikic that this could be the default behavior if the the `gh` binary is installed.

https://github.com/llvm/llvm-project/pull/186695