cmd, node, p2p/simulations: fix node account manager leak (#19004)

* node: close AccountsManager in new Close method

* p2p/simulations, p2p/simulations/adapters: handle node close on shutdown

* node: move node ephemeralKeystore cleanup to stop method

* node: call Stop in Node.Close method

* cmd/geth: close node.Node created with makeFullNode in cli commands

* node: close Node instances in tests

* cmd/geth, node: minor code style fixes

* cmd, console, miner, mobile: proper node Close() termination

p2p/simulations/network.go

@@ -22,6 +22,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"math/rand"
 	"sync"
 	"time"
@@ -569,6 +570,12 @@ func (net *Network) Shutdown() {
 		if err := node.Stop(); err != nil {
 			log.Warn("Can't stop node", "id", node.ID(), "err", err)
 		}
+		// If the node has the close method, call it.
+		if closer, ok := node.Node.(io.Closer); ok {
+			if err := closer.Close(); err != nil {
+				log.Warn("Can't close node", "id", node.ID(), "err", err)
+			}
+		}
 	}
 	close(net.quitc)
 }