[clang] [AArch64][SME2] Enable CLAMP multi-vector builtins for SME2 (PR #72272)

[Matthew Devereau via cfe-commits]

MDevereau wrote:

Hi Dinar, I can see you've added FCLAMP to #72487. Given these builtins are all defined in the same section in the acle [here](https://github.com/ARM-software/acle/pull/217/files#diff-516526d4a18101dc85300bc2033d0f86dc46c505b7510a7694baabea851aedfaR11371-R11394) I think it would make sense to introduce the single-vector variants in this pull request instead.

https://github.com/llvm/llvm-project/pull/72272