[clang] [llvm] [Clang][LLVM][AArch64] Add intrinsic for MOVT SME2 instruction (PR #97602)

[via cfe-commits]

https://github.com/SpencerAbson approved this pull request.

Thanks, LGTM. 

- (Note for the issue with ZT0 access attributes and FEAT_SME_LUTv2)

https://github.com/llvm/llvm-project/pull/97602