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

cmd/swarm/main.go

@@ -288,6 +288,7 @@ func bzzd(ctx *cli.Context) error {
 	if err != nil {
 		utils.Fatalf("can't create node: %v", err)
 	}
+	defer stack.Close()
 
 	//a few steps need to be done after the config phase is completed,
 	//due to overriding behavior
@@ -365,6 +366,8 @@ func getPrivKey(ctx *cli.Context) *ecdsa.PrivateKey {
 	if err != nil {
 		utils.Fatalf("can't create node: %v", err)
 	}
+	defer stack.Close()
+
 	return getAccount(bzzconfig.BzzAccount, ctx, stack)
 }