Print current Ruby version in console greeting

changelogs/unreleased/mk-console-ruby-version.yml

+---
+title: Print Ruby version in console greeting
+merge_request: 45370
+author:
+type: other

config/initializers/console_message.rb

@@ -4,6 +4,7 @@ if Gitlab::Runtime.console?
   justify = 15
 
   puts '-' * 80
+  puts " Ruby:".ljust(justify) + RUBY_DESCRIPTION
   puts " GitLab:".ljust(justify) + "#{Gitlab::VERSION} (#{Gitlab.revision}) #{Gitlab.ee? ? 'EE' : 'FOSS'}"
   puts " GitLab Shell:".ljust(justify) + "#{Gitlab::VersionInfo.parse(Gitlab::Shell.version)}"