all: library changes for swarm-network-rewrite (#16898)

This commit adds all changes needed for the merge of swarm-network-rewrite.
The changes:

- build: increase linter timeout
- contracts/ens: export ensNode
- log: add Output method and enable fractional seconds in format
- metrics: relax test timeout
- p2p: reduced some log levels, updates to simulation packages
- rpc: increased maxClientSubscriptionBuffer to 20000

p2p/simulations/network.go

@@ -382,6 +382,15 @@ func (net *Network) GetNodeByName(name string) *Node {
 	return net.getNodeByName(name)
 }
 
+// GetNodes returns the existing nodes
+func (net *Network) GetNodes() (nodes []*Node) {
+	net.lock.Lock()
+	defer net.lock.Unlock()
+
+	nodes = append(nodes, net.Nodes...)
+	return nodes
+}
+
 func (net *Network) getNode(id discover.NodeID) *Node {
 	i, found := net.nodeMap[id]
 	if !found {
@@ -399,15 +408,6 @@ func (net *Network) getNodeByName(name string) *Node {
 	return nil
 }
 
-// GetNodes returns the existing nodes
-func (net *Network) GetNodes() (nodes []*Node) {
-	net.lock.Lock()
-	defer net.lock.Unlock()
-
-	nodes = append(nodes, net.Nodes...)
-	return nodes
-}
-
 // GetConn returns the connection which exists between "one" and "other"
 // regardless of which node initiated the connection
 func (net *Network) GetConn(oneID, otherID discover.NodeID) *Conn {