[llvm] [Hexagon] Implement shouldConvertConstantLoadToIntImm (PR #146452)

[Sudharsan Veeravalli via llvm-commits]

svs-quic wrote:

I've pushed #151293 to remove the cfi information from the test checks. Can you let me know if the failure goes away with that?

https://github.com/llvm/llvm-project/pull/146452