[OpenMPOpt] Add support for BooleanStateWithSetVector

D101977 added `BooleanStateWithPtrSetVector` to store pointers to a set meanwhile
tracking boolean state. One of the limitation is that it can only store pointer.
We might want it to store other types of values, such as integer for parallel
level. This patch generalizes the idea and create `BooleanStateWithSetVector`.
`BooleanStateWithPtrSetVector` therefore becomes a type alias of `BooleanStateWithSetVector`.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D106149