[clang] [llvm] [AArch64] Add 9.7 CVT data processing intrinsics (PR #186807)

[via cfe-commits]

================

----------------
CarolineConcatto wrote:

Can we use this class: SVE2p1_Cvt_VG2_Pat, maybe it could be renamed to  SVE_Cvt_VG2_Pat if it can be used.

https://github.com/llvm/llvm-project/pull/186807