[Clang][SME2] Add single and multi min/max by vector builtins (#71707)

Adds the following SME2 builtins:

svminnm_single_f(16|32|64)_x(2|4)
svminnm_f(16|32|64)_x(2|4)
svmaxnm_single_f(16|32|64)_x(2|4)
svmaxnm_f(16|32|64)_x(2|4)

See
[ARM-software/acle#217](https://github.com/ARM-software/acle/pull/217)

Patch by: Kerry McLaughlin <kerry.mclaughlin@arm.com>