[mlir][NFC] Move SubTensorOp and SubTensorInsertOp to TensorDialect

The main goal of this commit is to remove the dependency of Standard dialect on the Tensor dialect.

* Rename ops: SubTensorOp --> ExtractTensorOp, SubTensorInsertOp --> InsertTensorOp
* Some helper functions are (already) duplicated between the Tensor dialect and the MemRef dialect. To keep this commit smaller, this will be cleaned up in a separate commit.
* Additional dialect dependencies: Shape --> Tensor, Tensor --> Standard
* Remove dialect dependencies: Standard --> Tensor
* Move canonicalization test cases to correct dialect (Tensor/MemRef).

Differential Revision: https://reviews.llvm.org/D104499