handle arbitrary slice types in sort builtin

[netliomax25-code]

sort only special-cases []any/[]int/[]float64/[]string, so a dynamically typed slice like []int64 or []uint falls through the switch and returns an empty slice with no error, silently dropping every element. Handle any slice or array through reflection like reverse and uniq do.

[antonmedv]

looks like a lot of generated expressions now are falling