[NFC][AArch64] Extracted AArch64PassConfig::isGlobalISelOptNone (#196856)
Extracts AArch64PassConfig::isGlobalISelOptNone into a AArch64TargetMachine, as suggested in reviews for
https://github.com/llvm/llvm-project/pull/194156
This will help with NewPM porting since this functionality is required
in NewPM orchestration.