[llvm] [Hexagon] Add Hexagon Copy Hoisting pass (PR #89313)

[Perry MacMurray via llvm-commits]

quic-pmacmurr wrote:

Hi @mikaelholmen, thank you for bringing this to my attention. I have fixed the test case in a new PR: https://github.com/llvm/llvm-project/pull/90740

https://github.com/llvm/llvm-project/pull/89313