[AArch64][SME]Update intrinsic interface for read/write (#65594)

The new ACLE PR#225[1] now combines the slice parameters for some
builtins. This patch is the #2 of 3 patches to update the interface.

Slice specifies the ZA slice number directly and needs to be explicity
implemented by the "user" with the base register plus the immediate
offset

[1]https://github.com/ARM-software/acle/pull/225/files