oneflow
                                
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                        Merge JUST-series macros between oneflow/core/common and oneflow/maybe
Since JUST macros in oneflow/maybe can be more customizable and modular, we can replace JUST macros in oneflow/core/common with these in oneflow/maybe, so that all infra in oneflow/maybe can be introduced to the codebase without naming conflict. And it is also the first step to replace all old maybe infra (TODO: maybe a tracking issue is needed).