[MLIR][Presburger] Support computing volumes via hyperrectangular overapproximation

Add support for computing an overapproximation of the number of integer points
in a polyhedron. The returned result is actually the number of integer points
one gets by computing the "rational shadow" obtained by projecting out the
local IDs, finding the minimal axis-parallel hyperrectangular approximation
of the shadow, and returning the number of integer points in that. This does
not currently support symbols.

Reviewed By: Groverkss

Differential Revision: https://reviews.llvm.org/D119228