implement `union!`, `intersect!`, `setdiff!` for non-sets

[StefanKarpinski]

We already have the mutating set operators for Set objects, but they make sense for vectors as well, which have the non-mutating versions already. The mutating operations should work on vectors as well.

[Vaibhavdixit02]

I would like to work on this issue, is it still up for grabs?

[rfourquet]

I have been working on this already in the last couple weeks, as a complentary PR to #23528 (that's why I assigned myself here).

[rfourquet]

@Vaibhavdixit02 If you feel like reviewing, please check #23528.

[rfourquet]

Closed by #23528.