Runtime metrics boilerplate

[sandreim]

This work was deferred from #4483. The main issue is that the runtime metrics registration happens on each runtime call. On top of that, incrementing metrics is not ergonomic because it requires either recreating the runtime metric object every time or passing it around.

One solution is to move metric registration logic to node side and register all runtime metrics early. This also reduces the amount of data the runtime will send via tracing for updating metrics.