[AArch64]SME2 Multi-vector-Multiple Vectors SQDMULH instructions

[AArch64]SME2 Multi-vector-Multiple Vectors SQDMULH instructions

 This patch adds the assembly/disassembly for the following instruction:
  SQDMULH (multiple vectors): Multi-vector signed saturating doubling multiply high.
For 2 and 4 ZA registers

The reference can be found here:
https://developer.arm.com/documentation/ddi0602/2022-09/SME-Instructions/SQDMULH--multiple-vectors---Multi-vector-signed-saturating-doubling-multiply-high-?lang=en

Depends on: D135563

Differential Revision: https://reviews.llvm.org/D135575