[MLIR][PDL] Generalize result type verification

Presently the result type verification checks if the type is used by a `pdl::OperationOp` inside the matcher. This is unnecessarily restrictive; the type could come from a `pdl::OperandOp or `pdl::OperandsOp` and still be inferrable.

Reviewed By: rriddle, Mogball

Differential Revision: https://reviews.llvm.org/D116083