Send recv op (#5520)
* WIP send recv op
* WIP send recv
* put grpc impl in details
* put grpc impl in details
* update wip
* update proto
* update proto
* update proto
* clean cmake
* wip on op implementations
* wip on op implementations
* compile ok adding ut
* wip unitest
* add extern cares for linking
* wip add ut
* working version send recv
* revert optimizer.py
* update test cmake
* add libtool to dockerfile
* update cmake dependency
* update cmake depends
* update cmake grpc depends
* fix cmake dependency
* fix compile error
* fix compile
* follow comments
* update
* update copyfrom
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qingqing01
dzhwinter
typhoonzero