[llvm] [AMDGPU] Run LowerLDS at the end of the fullLTO pipeline (PR #75333)

[Jon Chesterfield via llvm-commits]

JonChesterfield wrote:

Running the pass on the end of full lto doesn't work. There's lots of ways to break that, it was specifically thin lto that carefully carved out an exception. This has just shown up in fortran, @ergawy pinged me about it.

I'll raise an issue to get better visibility on it.

https://github.com/llvm/llvm-project/pull/75333