[AMDGPU] Split FeatureAtomicFaddInsts

FeatureAtomicFaddInsts is replaced with three more granular features.
Contributors:
Petar Avramovic <Petar.Avramovic@amd.com>

Patch 3/N for upstreaming of AMDGPU gfx11 architecture

Depends on D124537

Reviewed By: foad, #amdgpu, arsenm

Differential Revision: https://reviews.llvm.org/D124538