[mlir][bufferization] Add DeallocOp canonicalizer to remove duplicate values

Duplicate values in the retained list can just be removed, however, for duplicates in the list of memrefs to deallocate, we also need to check the conditions and if thhey don't match, we need to compute the OR in order to not miss a case leading to a memory leak.

Reviewed By: springerm

Differential Revision: https://reviews.llvm.org/D156157