portal-bridge: Pass bridge node arguments via portal-bridge CLI

[ogenev]

When we run portal-bridge, we spin trin or fluffy bridge node alongside the service that queries the data from EL and CL nodes. Then we use this bridge node to gossip the data to the rest of the network.

Currently, this bridge node runs with a hard-coded arguments:

trin/portal-bridge/src/client_handles.rs

Line 18 in 633e53b

.arg("--storage-size:0")

What we would like is to be able to modify most of those arguments via the portal-bridge CLI here

trin/portal-bridge/src/cli.rs

Line 20 in 633e53b

pub struct BridgeConfig {

For example, this can be useful when we want to run the portal-bridge node locally and if we want to connect the bridge node to a local or specific public bootnode.