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_Examples.Output.verified.txt

@@ -1,4 +1,4 @@
-DESCRIPTION:
+DESCRIPTION:
 The dog command.
 
 USAGE:
@@ -18,7 +18,6 @@ ARGUMENTS:
 
 OPTIONS:
     -h, --help            Prints help information
-    -v, --version         Prints version information
     -a, --alive           Indicates whether or not the animal is alive
     -n, --name <VALUE>
     -g, --good-boy