replace network_handle instance with boxed api trait

[mattsse]

Describe the feature

This currently requires an instance of networkhandle:

reth/crates/node/events/src/node.rs

Lines 39 to 40 in 7401f46

	/// Connection to the network.
	network: Option<NetworkHandle>,

which is only used to get the current number of connected peers

reth/crates/node/events/src/node.rs

Line 74 in 7401f46

self.network.as_ref().map(|net| net.num_connected_peers()).unwrap_or_default()

which is called via the PeersInfo trait, we can simply use a box here to get rid of the handle instance

TODO

replace

reth/crates/node/events/src/node.rs

Lines 39 to 40 in 7401f46

	/// Connection to the network.
	network: Option<NetworkHandle>,

with Option<Box<dyn PeersInfo>>

Additional context

No response

[nicosanc]

I'd like to take on this task