PR login name for `google-readability-todo`

[bwrsandman]

It would be useful if the PR author's username was used for the suggested fix of google-readability-todo. Currently it has unknown.

Clang-tidy gets the name from the USER environment variable, the config parameter and the config files. This is how I would do it if it wasn't in a container. USER: ${{ github.event.pull_request.user.login }}

[ZedThree]

Should be possible to pass that in as an argument?

[bwrsandman]

Should be able to do this with the github api and setting the docker's env without needing an argument.

I don't see why we'd want an argument for this unless users prefer using something else than login