A couple times now we've hit bugs like WFLY-18296. We need some flavor of CI that runs the testsuite using a JRE instead of a JDK.

From a glance at https://github.com/actions/setup-java this may be doable for PRs using a github action, although running all of the TS in an action seems questionable. But perhaps at least the smoke tests. Then a nightly job could be used for something more complete.

The 'noCompile' (-DnoCompile) profile I added during work on SE 17 support can be used here; its purpose was to allow building everything with one SE and then testing with another.