[llvm] [HLSL] Move FNeg legalization to the DXILLegalization pass (PR #140942)

[Sarah Spall via llvm-commits]

https://github.com/spall commented:

I don't think your pr description will close the issue automatically.
https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/using-keywords-in-issues-and-pull-requests

https://github.com/llvm/llvm-project/pull/140942