[mlir][Linalg] Add a transform dialect op to rewrite ops to destination passing style.

A new transform dialect op is introduced to perform the rewrite.
The test pass option is now obsolete and is removed in favor of the transform.

In the process I realized the tensor.pad nofold attribute was not taken into account
and added support to emit a bufferization.alloc_tensor + linalg.copy.

Reviewed By: springerm

Differential Revision: https://reviews.llvm.org/D143943