Move LANGUAGE_ARRAY definition and initialization to a dedicated file
(globals/languages.sh) so we can source it in different places without
having to source the whole linter.sh
Move the logic to build the linter versions file outside the main
runtime. There's no need to include it there because it's used only when
building the image.
Move the list of linters by name in linterVersions.sh because we don't
need it in any other place.
