Exercise enrich-classpath and all Orchard Parser variants in CI

[vemv]

• Exercise enrich-classpath in CI
• Exercise each of the three Orchard Java parsers
  • This is accomplished by either of
  • excluding enrich-classpath;
  • including it partially (removing the --add-opens flags it adds);
  • or including it fully.

It is valuable to check that our usual tests don't fail in presence of Enrich. Just a couple tests had to be adapted (for the better: with enrich in, the assertion is richer).

It's basically the same setup I introduced in https://github.com/clojure-emacs/orchard/pull/192 , with some variations.

Cheers - V

[bbatsov]

Looks good to me.