[llvm] [AMDGPU][GIsel] Properly handle unsupported intrinsic translation (PR #228040)

[Vikram Hegde via llvm-commits]

vikramRH wrote:

I see other failure cases in IRTranslator being handled via reportTranslationError. However https://github.com/llvm/llvm-project/pull/208567 changed it so that we don't immediately abort, in which case we continue with the pipeline. so I guess it makes sense to at least have valid MIR after reporting ?

https://github.com/llvm/llvm-project/pull/228040