Add handlers to State sync / Execution Data sync to stream to consumers

[koko1123]

Register new handlers with OnBlockFinalized (in execution data sync) and OnFinalizedBlock (in state sync) in the observer engine to stream.send the data received to all consumers in their respective live consumer caches

[szegedim]

Optional: Was a common name of the same data/event e.g. OnBlockFinalizationEvent considered?

[peterargue]

this was implemented here: https://github.com/onflow/flow-go/pull/3723