refactor(network): Default configs as constants for layer2

[juslesan]

Summary

Added constants for default configurations for Layer2 classes.

Changes

• Random node view count is now configured with the nodeViewSize config option

Future improvements

• Do the same for the discovery layer refactor(network): Default configuration constants for DiscoveryLayerNode #3000
• Remove remaining magic numbers around ControlLayerNode configuration (Could also clean up on the DHT side).
• Could maybe pass some of the defaults from a higher layer (for example the sdk). This will require some thought as some of the configs could be wanted on a per stream partition basis and others for all streams.
• Rename all fields with listSize to ie listNodeCount

[harbu]

lgtm