[llvm] [NVPTX] Aggressively try to replace image handles with references (PR #119730)

[Justin Fargnoli via llvm-commits]

justinfargnoli wrote:

> Can you highlight what test changes are a result of your change?

[This link](https://github.com/llvm/llvm-project/pull/119730/commits/dfad91ec809beebed116550886b785de1b8080ed) does that. 

https://github.com/llvm/llvm-project/pull/119730