[Feature Request][core]: load balance core endpoints

[tuxcanfly]

Implementation ideas

Currently we accept a single core.rpc.endpoint/core.grpc.endpoint. It would be ideal to allow a list of core endpoints to be configured such that the node can load balance between them to minimise the risk of transaction failure.

[Wondertan]

@cmwaters, is this something the core Signer could do?

[distractedm1nd]

I will do this on top of #3153 rn

[distractedm1nd]

But architecturally, it does not make sense at all for node to be doing the load-balancing. Traditionally the load balancing is taken care of up the stack. But I will implement quickly anyways to show what it would look like

[Wondertan]

it does not make sense at all for node to be doing the load-balancing.

Absolutely.

[ramin]

closing as load balancing not a concern of node itself