Get maven unleash plugin work with Java 17 or switch to maven release plugin

[pfink]

As discussed in #1445, we have to either switch to a maven unleash version that works with Java 17 (I would have to create such a version because it is no longer maintained) or use the maven release plugin instead.

[mhoffrog]

@pfink - FYI - did continue maintenance of unleash-maven-plugin on https://github.com/mavenplugins/unleash-maven-plugin. The recent version 3.0.1 io.github.mavenplugins:unleash-maven-plugin:3.0.1 is available on Maven Central and works for JAVA 8 - JAVA 21. Dependency versions for cdi-utils, cdi hooks and scm git are:
io.github.mavenplugins:cdi-plugin-utils:4.0.0
io.github.mavenplugins:cdi-plugin-hooks:0.2.0
io.github.mavenplugins:unleash-scm-provider-git:3.0.1
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