[llvm] workflows/release-task: Add job for publishing to winget (PR #185988)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 commented:

So this workflow essentially just automatically opens up PRs against the `winget-pkgs` repository?

Why can someone not just have a cron job (or some equivalent) downstream that detects if there is a new LLVM release and open a new PR from that?

https://github.com/llvm/llvm-project/pull/185988