[jdk21u-dev] RFR: 8341148: Open source several Choice related tests

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle

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Commit messages:
 - Backport 19642bd3833fa96eb4bc7a8a11e902782e0b7844

Changes: https://git.openjdk.org/jdk21u-dev/pull/1627/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1627&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341148
  Stats: 398 lines in 5 files changed: 398 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1627.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1627/head:pull/1627

PR: https://git.openjdk.org/jdk21u-dev/pull/1627