[jdk21u-dev] RFR: 8339794: Open source closed choice tests #1

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle

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

Commit messages:
 - Backport 5e5942a282e14846404b68c65d43594d6b9226d9

Changes: https://git.openjdk.org/jdk21u-dev/pull/1532/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1532&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339794
  Stats: 383 lines in 3 files changed: 383 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1532.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1532/head:pull/1532

PR: https://git.openjdk.org/jdk21u-dev/pull/1532