Separate telemetry by component

[Mirko-von-Leipzig]

Open-telemetry has service.name and service.namespace. Currently these are miden-node and empty respectively.

The specification indicates that service.name should be identical across horizontal scaling. Or in other words, we should probably have separate service.name for each component in the node i.e. store, rpc, block-producer. And then the namespace could simply be miden or miden-node.

Its unclear how easy this would be to implement, but it will require separately instrumenting each component somehow.