* Fixed race condition in UbaNetworkClient related to message ids and returning message ids after use
* Implemented network backend that is using memory for communication (will be used between client and proxy server when running inproc)
* Added connection uid provided by network backend to be able to improve error messages
* Added NetworkBackend GetTotalSendAndRecv that can be used to fetch all traffic on backend
[CL 31981782 by henrik karlsson in ue5-main branch]
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