[orchestrator] create separate structure for deployment and provisioning serializers
[tasks] small refactoring of deployment method
[models] add prepare_for_provisioning for cluster
[models] small refactoring, do not create network manager each time
[models] add helper offline for Node
remove skiped test
[serializers] extract serialization logic for provisioning in to separate class
[naily] fix provisioning format for naily
fix flake8