devel/maven39: new port: version 3.9 of devel/maven

java/eclipse requires Maven 3.9+ and actual version of devel/maven is 3.8.
This patch adds devel/maven39 to manage this requirement.

Changelog: https://maven.apache.org/docs/3.9.4/release-notes.html

Co-authored-by: Michael Osipov <michaelo@apache.org>

PR: 272863