Print bootnode mismatch message as warning (#12075)

* Print bootnode mismatch message as `warning`

* Fix test :thinking_face:

* Remove wrong warning

substrate/client/network/src/service.rs

@@ -160,18 +160,7 @@ where
 			.network_config
 			.boot_nodes
 			.into_iter()
-			.filter(|boot_node| {
-				if boot_node.peer_id == local_peer_id {
-					warn!(
-						target: "sub-libp2p",
-						"Local peer ID used in bootnode, ignoring: {}",
-						boot_node,
-					);
-					false
-				} else {
-					true
-				}
-			})
+			.filter(|boot_node| boot_node.peer_id != local_peer_id)
 			.collect();
 		params.network_config.default_peers_set.reserved_nodes = params
 			.network_config
@@ -1825,7 +1814,7 @@ where
 								if let ConnectedPoint::Dialer { address, role_override: _ } =
 									endpoint
 								{
-									error!(
+									warn!(
 										"💔 The bootnode you want to connect to at `{}` provided a different peer ID `{}` than the one you expect `{}`.",
 										address,
 										obtained,