[LLVM][AArch64][Assembly]: Add FAMINMAX assembly/disasse… (#70115)

…mbly.

This patch adds the feature flag FAMINMAX and the assembly/disassembly
for the following instructions of NEON, SVE2 and SME2:
* NEON:
  - FAMIN
  - FAMAX
* SVE2:
  - FAMIN_ZPmZ
  - FAMAX_ZPmZ
* SME2:
  - FAMAX_2Z2Z
  - FAMIN_2Z2Z
  - FAMAX_4Z4Z
  - FAMIN_4Z4Z

That is according to this documentation:
https://developer.arm.com/documentation/ddi0602/2023-09



Co-authored-by: Caroline Concatto <caroline.concatto@arm.com>