[clang] [llvm] [OpenMP] Drop optimistic attributes from taskloop bound arguments (PR #233849)

[Nicole Aschenbrenner via cfe-commits]

nicebert wrote:

> ah, see this was just approved now... Guess maybe it doesn't matter much then on how it goes in...

I created it stacked on your PR it carries your commits until you merge yours. I just approved your PR. I think since it squash merges it would loose the messages from your commits so I think it would be better if you merge your PR and then I rebase this one.

https://github.com/llvm/llvm-project/pull/233849