cli: ensure chain is properly stopped after chain-related commands

Blockchain occupies resources (e.g. it opens log files for DB, etc.)
on creation and running. We need to release these resources if something
goes wrong during execution chain-related commands.

This commit solves the following problem on Windows:
```
--- FAIL: TestServerStart (0.32s)
    --- FAIL: TestServerStart/stateroot_service_is_on_&&_StateRootInHeader=true (0.04s)
        testing.go:894: TempDir RemoveAll cleanup: remove C:\Users\Anna\AppData\Local\Temp\TestServerStart_stateroot_service_is_on_&&_StateRootInHeader=true460557297\001\neogotestchain\000001.log: The process cannot access the file because it is being used by another process.
    --- FAIL: TestServerStart/invalid_Oracle_config (0.03s)
        testing.go:894: TempDir RemoveAll cleanup: remove C:\Users\Anna\AppData\Local\Temp\TestServerStart_invalid_Oracle_config810064028\001\neogotestchain\000001.log: The process cannot access the file because it is being used by another process.
    --- FAIL: TestServerStart/invalid_consensus_config (0.04s)
        testing.go:894: TempDir RemoveAll cleanup: remove C:\Users\Anna\AppData\Local\Temp\TestServerStart_invalid_consensus_config217270091\001\neogotestchain\000001.log: The process cannot access the file because it is being used by another process.
    --- FAIL: TestServerStart/invalid_Notary_config (0.07s)
        --- FAIL: TestServerStart/invalid_Notary_config/malformed_config (0.04s)
            testing.go:894: TempDir RemoveAll cleanup: remove C:\Users\Anna\AppData\Local\Temp\TestServerStart_invalid_Notary_config_malformed_config754934830\001\neogotestchain\000001.log: The process cannot access the file because it is being used by another process.
        --- FAIL: TestServerStart/invalid_Notary_config/invalid_wallet (0.03s)
            testing.go:894: TempDir RemoveAll cleanup: remove C:\Users\Anna\AppData\Local\Temp\TestServerStart_invalid_Notary_config_invalid_wallet934249397\001\neogotestchain\000001.log: The process cannot access the file because it is being used by another process.
    --- FAIL: TestServerStart/good (0.11s)
        testing.go:894: TempDir RemoveAll cleanup: remove C:\Users\Anna\AppData\Local\Temp\TestServerStart_good596150160\001\neogotestchain\000001.log: The process cannot access the file because it is being used by another process.
```

This commit also unifies blockchain and services releasing code.

cli/server/server.go

@@ -307,9 +307,11 @@ func restoreDB(ctx *cli.Context) error {
 	if err != nil {
 		return err
 	}
-	defer chain.Close()
-	defer prometheus.ShutDown()
-	defer pprof.ShutDown()
+	defer func() {
+		pprof.ShutDown()
+		prometheus.ShutDown()
+		chain.Close()
+	}()
 
 	var start uint32
 	if ctx.Bool("incremental") {
@@ -477,6 +479,11 @@ func startServer(ctx *cli.Context) error {
 	if err != nil {
 		return cli.NewExitError(err, 1)
 	}
+	defer func() {
+		pprof.ShutDown()
+		prometheus.ShutDown()
+		chain.Close()
+	}()
 
 	serv, err := network.NewServer(serverConfig, chain, chain.GetStateSyncModule(), log)
 	if err != nil {
@@ -539,9 +546,6 @@ Main:
 			if serverErr := rpcServer.Shutdown(); serverErr != nil {
 				shutdownErr = fmt.Errorf("error on shutdown: %w", serverErr)
 			}
-			prometheus.ShutDown()
-			pprof.ShutDown()
-			chain.Close()
 			break Main
 		}
 	}