[llvm] [Github][MLGO] Add workflow to release mlgo utils (PR #78885)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

@tstellar Once this gets approved, we'll need to add the secrets. I'm assuming we can't just reuse the lit secrets as they're probably repository specific. I also have the `mlgo-utils` project (tried to get `mlgo`, pypi complains it is too close another package name) registered on PyPI and test PyPI. We'd like to do this under the llvm PyPI account if possible, so I'm assuming I'll have to transfer them?

If that's not feasible, I can also just keep them on my account and send tokens over.

https://github.com/llvm/llvm-project/pull/78885