[llvm] [DirectX] Add Root Signature Version Support and Update Test IR Format (PR #144957)

[Justin Bogner via llvm-commits]

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

This looks good, but the commit message is absurdly verbose and repeats itself about the testing changes three times. Please write something clearer and more succinct


https://github.com/llvm/llvm-project/pull/144957