[SveEmitter] Add builtins for permutations and selection

This patch adds builtins for:
- svlasta and svlastb
- svclasta and svclastb
- svunpkhi and svunpklo
- svuzp1 and svuzp2
- svzip1 and svzip2
- svrev
- svsel
- svcompact
- svsplice
- svtbl