[#958] cli/locode: Open RO database in info command

CLI `util locode info` command does not write operations. Opening a
`locodebolt.DB` instance in RW mode is redundant.

Provide `locodebolt.ReadOnly()` option to `locodebolt.DB` constructor in
order to create READ flock over BoltDB file.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

cmd/neofs-cli/modules/util.go

@@ -159,7 +159,7 @@ var (
 		Run: func(cmd *cobra.Command, _ []string) {
 			targetDB := locodebolt.New(locodebolt.Prm{
 				Path: locodeInfoDBPath,
-			})
+			}, locodebolt.ReadOnly())
 
 			err := targetDB.Open()
 			exitOnErr(cmd, err)