【cherry-pick】cherry-pick refactor mp to Release/2.4 #46121
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* refactor mp. * update setup.py. * update mp_layers.py for compatibility. * add documents for mp_layers.py * update init.py * update collective.py. * update. * update mp_ops.py * update. * update code style. * update code style.
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dingjiaweiww
approved these changes
Sep 19, 2022
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Describe
refactor mp:
this PR mainly changes some dir of mp functions and classes.
move some private functions about mp to 'fleet/layers/mpu' from collective.py(to simplify it).
when using functions for mp operations, we recommend to call it as 'fleet.layers.mpu.xxx'.
users are not aware of it, Compatible with the upgrade.