Make -v|--version opt-in

We added an automatic version option in 0.49. We did this with good
intentions, but forgot that people might already use --version
as an option for a root command.

This commit makes -v|--version completely opt-in.

test/Spectre.Console.Cli.Tests/Expectations/Help/Default.Output.verified.txt

@@ -1,4 +1,4 @@
-DESCRIPTION:
+DESCRIPTION:
 The lion command.
 
 USAGE:
@@ -10,8 +10,7 @@ ARGUMENTS:
 
 OPTIONS:
                              DEFAULT
-    -h, --help                                   Prints help information
-    -v, --version                                Prints version information
+    -h, --help                                   Prints help information
     -a, --alive                                  Indicates whether or not the animal is alive
     -n, --name <VALUE>
         --agility <VALUE>    10                  The agility between 0 and 100