[mlir][ExecutionEngine] Fix missing return from operator==() in `OwningMemRef` (#179655) Closes [#91233](https://github.com/llvm/llvm-project/issues/91233) mlir/include/mlir/ExecutionEngine/MemRefUtils.h:190:No 'return' statement in non-void function --------- Co-authored-by: braam-76 <braam67.gamidov@yandex.com> GitOrigin-RevId: 14e50aa4c53e4ef1c3d3b6c31fd01815a0c1bfb6
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