Added RecursiveMemoryEffects to ExecuteRegionOp to be aligned to other
ops with region and get appropriate support in all appropriate passes,
which need RecursiveMemoryEffects.
The added test in dealloc-memoryeffect-interface.mlir fails with error
'ops with unknown memory side effects are not supported' without
RecursiveMemoryEffects.
The updated test in one-shot-module-bufferize.mlir gets cleaned by DCE
once the interface is added. Added func.call @foo():()->() which has
effect to keep execute_region from being removed.
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Co-authored-by: Mehdi Amini <joker.eph@gmail.com>
50b907751f