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

node/service_test.go

@@ -67,6 +67,7 @@ func TestContextServices(t *testing.T) {
 	if err != nil {
 		t.Fatalf("failed to create protocol stack: %v", err)
 	}
+	defer stack.Close()
 	// Define a verifier that ensures a NoopA is before it and NoopB after
 	verifier := func(ctx *ServiceContext) (Service, error) {
 		var objA *NoopServiceA