[mlir][linalg][bufferize] Add `createDealloc` options

If `createDealloc` is deactivated (enabled by default), newly allocated buffers are not deallocated anymore. In such a case, the missing deallocations can be inserted by the existing "BufferDeallocation" pass.

This change is needed for unifying core bufferization and Comprehensive Bufferize. Core bufferization has a separate pass for generating deallocations.

Note: In the future, this will evolve towards generating deallocation ops only for buffer allocations that do not escape block boundaries (i.e., that are in destination passing style).

Differential Revision: https://reviews.llvm.org/D116450