An local load balancer inside the smesher-service for multiple nodes connection.

[pigmej]

For ease of use, we need to implement a local load balancer for node connections inside the semesher-service.

• There should be a possibility to configure multiple nodes per smesher-service
• At the start, the order of nodes is randomized

To be decided

Backend logic

1. Simple RoundRobin is implemented for the connections
2. Randomze and use the same backend till the first error, then go to the next

I'm not sure which one is better. The first one can lead to a flaky debugging experience and potentially flaky errors, and the second one can lead to "node ddos".