Bug#990538: Please package a new testng version 7.x

TestNG 7.x requires Gradle 7 to build, this means we have to complete the packaging of Kotlin first (or rewrite the build script). Emmanuel Bourg

Bug#990538: Please package a new testng version 7.x

Package: src:testng OpenJDK 17, and 18 now require jtreg 6 to run the tests. Looking at jtreg 6 itself, I read: * TestNG: See . The recommended version is currently 7.3.0. (Do not use 7.4.0 to run OpenJDK tests.) TestNG has dependencies on JCommander and Google Gu