[lilliput-jdk17u:lilliput] RFR: 8300138: [Lilliput/JDK17] Optimize anonymous owner fix-up path

[Roman Kennke]

I'd like to push this optimization to Lilliput/JDK17. I already included it in the [upstream fast-locking change](https://github.com/openjdk/jdk/pull/10907), soon to be merged into Lilliput tip. It simplifies the fast-unlocking code and makes it more efficient. See JBS entry for more details.

Testing:
 - [x] tier1
 - [x] tier2

-------------

Commit messages:
 - Use testb instead of testptr for anon-test
 - Missing testptr with Address arg
 - 8300138: [Lilliput/JDK17] Optimize anonymous owner fix-up path

Changes: https://git.openjdk.org/lilliput-jdk17u/pull/3/files
 Webrev: https://webrevs.openjdk.org/?repo=lilliput-jdk17u&pr=3&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300138
  Stats: 21 lines in 3 files changed: 7 ins; 9 del; 5 mod
  Patch: https://git.openjdk.org/lilliput-jdk17u/pull/3.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk17u pull/3/head:pull/3

PR: https://git.openjdk.org/lilliput-jdk17u/pull/3