[mlir][SCF] ValueBoundsOpInterface: Support `scf.for` results and iter_args

If an `scf.for` loop yields an equal index-typed value or a shaped value with the same dimension sizes (in comparison to the corresponding iter_arg), bounds can be computed for the iter_arg and the OpResult of the `scf.for` op.

Differential Revision: https://reviews.llvm.org/D146306