[mlir][Transform] Add support for dynamically unpacking tile_sizes /...

[mlir][Transform] Add support for dynamically unpacking tile_sizes / num_threads in tile_to_foreach_thread

This commit adds automatic unpacking of Value's of type pdl::OperationType to the underlying single-result OpResult.
This allows mixing single-value, attribute and multi-value pdl::Operation tile sizes and num threads to TileToForeachThreadOp.

Differential Revision: https://reviews.llvm.org/D137896