Starting the node server before metadata is set up leads to panics on connection attempts

[tillrohrmann]

Starting the node server before metadata is set up leads to panics on connection attempts after #2185 was merged. The problem is that we need to start the node server before setting up the metadata because the metadata store runs on this server. This allows, however, that connection attempts are being made before my_node_id is properly set which leads to the panic of the runtime.

[tillrohrmann]

Right now, #2185 has been reverted on main to solve the problem.