[llvm] [AMDGPU] Enable volatile and non-temporal for loads to LDS (PR #153244)

[Pierre van Houtryve via llvm-commits]

Pierre-vh wrote:

It's missing the memory legalizer tests. I'd like to see a test that follows the same pattern as the other memory legalizer tests (`memory-legalizer-...`).

- One check line for all archs
- Test a reasonable mix of DMA operations with the desired flags.

https://github.com/llvm/llvm-project/pull/153244