[#62889580] Remove launcher

This PR removes the last published gem: http://rubygems.org/gems/vcloud-launcher
And because it's the last one removes a lot of other stuff, like the Rakefile (there are no tests here any more!)

Some stuff is left behind and will be addressed in later stories
- the utils directory will be moved (and this is why I've left `lib/vcloud.rb` intact for now)
- the gemspec will need to be updated to make this a meta gem
- some other tidy-up