[patch] Remove Junit 4 last remains

[gaben]

While working on some patches, I noticed that IntelliJ still has ancient Junit4 files on the classpath. I therefore started removing them completely from the core.

I only focused on the core, the core plugins still have to be checked.

FYI: There is an existing ticket for Junit 6 migration (#24921).

[gaben]

Also #23090 should be fixed with the changes.

[gaben]

Beware, the patch introduces deprecations, but it should ultimately be leaner and cleaner for everyone in the long term.

Some adjustments will probably be needed.

Changes:

• removed all references to JUnit 4 (dropped junit-vintage-engine, junit-jupiter-migrationsupport), JOSMTestRules now runs on plain Jupiter callbacks
• build cleanup:
  • removed the unused commonslang/errorprone_javac ivy confs and the javacc.home property,
  • fixed the jdeps "all" graph and standalone ant extract-libraries, and
  • synced commons-lang3 between Ant and Maven.
• josm-custom.jar no longer bundles commons-lang3 and Jetbrains annotations; the sources jar now ships jakarta.annotation-api 3.0.0 sources, matching the classes.
• tests no longer write foobar/ or failed.png into the working copy (#23090)
• PluginHandlerJOSMTooOldTest no longer fails on my machine with hu_HU locale. The expected strings were built before the test switched the locale to English, so they had the wrong thousands separator.