[llvm] [GlobalISel][AArch6] Add G_FPTOSI_SAT/G_FPTOUI_SAT (PR #96297)

[Thorsten Schütt via llvm-commits]

tschuett wrote:

Could you link/fixes https://github.com/llvm/llvm-project/issues/94694 and maybe take the test case?

https://github.com/llvm/llvm-project/pull/96297