[MLIR] Extend isLoopMemoryParallel to account for locally allocated memrefs

Extend isLoopMemoryParallel check to include locally allocated memrefs.
This strengthens and also speeds up the dependence check used by the
utility by excluding locally allocated memrefs where appropriate.

Additional memref dialect ops can be supported exhaustively via proper
interfaces.

Reviewed By: dcaballe

Differential Revision: https://reviews.llvm.org/D120617