Implement eureka bind_port

[jawoznia]

if eu_recv_packet is present and the ContractInfo::eureka_port is None we should bind a port and set it in the ContractInfo::eureka_port on:

• instantiate
• migrate

Pass a closure impl Fn(Addr) -> Result<String> on WasmKeeper creation that binds the port and returns the bounded port. Default implementation should call bindPort(format!("wasm.{addr}")).