[llvm] [AMDGPU] Don't cluster lds instrs together (PR #180908)

[Stanislav Mekhanoshin via llvm-commits]

rampitec wrote:

I think we have seen benefits of LDS clustering in the past. I suspect the current problem is not that we cluster it but that we cluster too much.

https://github.com/llvm/llvm-project/pull/180908