[mlir] GreedyPatternRewriteDriver: Enqueue ancestors in MultiOpPatternRewriteDriver

The `GreedyPatternRewriteDriver` was extended to enqueue ancestors in D140304. With this change, `MultiOpPatternRewriteDriver` behaves the same way.

Note: `MultiOpPatternRewriteDriver` now also has a scope that limits how far we go when checking ancestors. By default, this is the first common region of all given ops.

Differential Revision: https://reviews.llvm.org/D141945