Add a test for `raku -V`
Add a test for `raku -V`

Make sure it succeeds and returns config options. Don't do any deep
inspection of the configuration options. (Which would be a bad idea.)

Fixes #3875

MasterDuke17/rakudo,labster/rakudo,labster/rakudo,rakudo/rakudo,rakudo/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,rakudo/rakudo,tbrowder/rakudo,tbrowder/rakudo,tony-o/rakudo,salortiz/rakudo,tony-o/rakudo,salortiz/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,rakudo/rakudo,labster/rakudo,labster/rakudo,tbrowder/rakudo,rakudo/rakudo,salortiz/rakudo,tony-o/rakudo,salortiz/rakudo,tony-o/rakudo,labster/rakudo,salortiz/rakudo,tony-o/rakudo,rakudo/rakudo,labster/rakudo,salortiz/rakudo,tony-o/rakudo