[llvm] [AArch64][GlobalISel] Select G_ICMP Zero Instruction (PR #90054)

[Amara Emerson via llvm-commits]

aemerson wrote:

Is there any effect on SDAG codegen? If so then we can keep it in InstrInfo but if these new patterns only influence GlobalISel then I think it makes sense to separate them to avoid confusion about their purpose.

https://github.com/llvm/llvm-project/pull/90054