Add support for PMD 7, for Kotlin rules

[jborgers]

PMD 7 is under development. The advantage of PMD 7 is that it supports Antlr grammers. We use the existing Antlr Kotlin grammer to add support for Kotlin and create Kotlin rules in PMD.

As a Sonar user, I want these Kotlin rules, by PMD 7 support in the sonar-pmd plugin, to become available in Sonar.

[jborgers]

I am working on a PR