[llvm] [AMDGPU] Enabled machine scheduler option amdgpu-use-amdgpu-trackers. (PR #169187)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> > * materialize-frame-index-sgpr.ll: This test uses inline assembly but GCN trackers do not account for physical registers, leading to out of registers error during RA. Hence GCN trackers have been disabled for this test.
> 

This is a showstopper. The scheduler cannot make physical register constraints worse than in the original MIR if it cannot guarantee the function will be allocatable after 



https://github.com/llvm/llvm-project/pull/169187