[Builder] - Arbitrary number of builders in examples

[QuentinI]

What is this task and why do we need to work on it?

Currently we run builder per node in examples. This behavior needs to be configurable, so that we allow running N builders per M nodes.

What work will need to be done to complete this task?

Change orchestrator and examples to support running arbitrary number of builders per network.

Are there any other details to include?

No response

What are the acceptance criteria to close this issue?

Examples can be run with arbitrary number of builders, tests pass.

Branch work will be merged to (if not the default branch)

No response