Don't print test suite information to STDERR

The formatters meant for human consumption (like pretty and our debug) will make use of things written to STDOUT and write it at an appropriate place, unlike STDERR which will only be printed to the terminal => this info doesn’t end up in files when we log to them. We should eliminate all instances where we print to STDERR, perhaps using something like:

require 'cucumber/formatter/console'
def puts_info(m = "")
  # This trick allows us to use a module's (~private) method on a one-off basis.
  puts Class.new.extend(Cucumber::Formatter::Console).format_string(m, :white)
end

Feature Branch: test/10151-organize-artifacts

Related issues

• Blocked by #10151 (closed)

Original created by @anonym on 10342 (Redmine)