[llvm] [AMDGPU] Introduce "amdgpu-sw-lower-lds" pass to lower LDS accesses. (PR #87265)

[via llvm-commits]

skc7 wrote:

> Update:
> 
> * This PR has been rebased to latest main to use the AMDGPUAsanInstrumentation APIs to instrument LDS instructions lowered to global memory.
> * New tests have been added check the asan instrumented IR.
> * Feature has been enabled in local downstream builds and tested with all the static, dynamic LDS cases and they seem to detect any addressing errors.

Hi reviewers. Please let me know if there is any change that needs to be done to get the approval for this PR.

https://github.com/llvm/llvm-project/pull/87265