Added OopMapsValue and OopMapsSameGroupValue, mirrors OopMaps tests using Integer instances to test contended oop maps with value class objects.
- [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - 8384107: Add custom value class OopMaps contended test - 8384107: Update runtime/contended tests to run the same testing for value classes Changes: https://git.openjdk.org/valhalla/pull/2413/files Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2413&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8384107 Stats: 351 lines in 3 files changed: 351 ins; 0 del; 0 mod Patch: https://git.openjdk.org/valhalla/pull/2413.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2413/head:pull/2413 PR: https://git.openjdk.org/valhalla/pull/2413
