[llvm] [AMDGPU] Move renamedInGFX9 from TableGen to SIInstrInfo helper function/macro to free up a bit slot (PR #82787)

[Corbin Robeck via llvm-commits]

CRobeck wrote:

I'm happy to update the PR to something that we are OK merging but it wasn't clear there was a consensus on a path forward.

I'm not sure I have another solution to moving things out of the TableGen file to free up this bit slot. 

https://github.com/llvm/llvm-project/pull/82787