[llvm] [AMDGPU] Add amdgpu-sw-lower-lds pass to NPM codegen addIRPasses. (PR #124102)

[Matt Arsenault via llvm-commits]

arsenm wrote:

We don't really need to test the new and old PM in every single test of the pass, you can drop most of the test changes or migrate most of them to only use the new pm 

https://github.com/llvm/llvm-project/pull/124102