[llvm] [Github] Add sudo to CI container (PR #122036)

[Tom Stellard via llvm-commits]

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

The default GitHub images also have password-less sudo, so it makes sense to add it to the container.  Otherwise, we'll keep running into these kinds of issues.

https://github.com/llvm/llvm-project/pull/122036