[mlir][bufferization] Canonicalizer to skip extract_strided_metadata when...

[mlir][bufferization] Canonicalizer to skip extract_strided_metadata when operand is already a base memref.

The `extract_strided_metadata` will be heavily used by the new buffer deallocation pass to get the base memref and pass it to the deallocation operation. This commit factors out some simplification logic of the pass into a canonicalization pattern.

Reviewed By: springerm

Differential Revision: https://reviews.llvm.org/D157255