How to run the TCK 4.0.1 with jdk21?

[simonladen]

Hello,
Trying to run the XML binding TCKs against Payara server in EE11, I downloaded the release 4.0.1.
But I cannot find a way to run these tests.

Javatest comes with the security manager and won't run with jdk21 (or above).
The documentation mentions we can use ant runclient to run subsets, but there are no build.xml in the tests.
The readme in this project appears to date from jdk 8. And the documentation included in the release only mentions the release 3.0.

So, are the steps to run the tests different from the documentation and the readme?
Am I doing missing something obvious?
Also, can these TCK be run from maven, without starting javatest manually?