This commit changes the way we produce kuryr-cni Docker image. Previously we've
distributed the kuryr-driver as pyinstaller binary that contained Python 3
interpreter and all the dependencies. This binary was called from CNI. That
approach had some disadvantages, the major being complicated build procedure
and having to see false-positive BrokenPipeError tracebacks in kubelet
logs.
This commit implements distributing kuryr-driver as a virtualenv with
kuryr-kubernetes and all the dependecies installed. That virtualenv is then
copied onto the host system and CNI can easily activate it and run kuryr-cni
binary. This should solve issues caused by pyinstaller.
Closes-Bug: 1747058
Change-Id: I65b01ba27cbe39b66f0a972d12f3abc166934e62
78102c9984