[jdk21u-dev] RFR: 8340621: Open source several AWT List tests

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle

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Commit messages:
 - Backport ae4d2f15901bf02efceaac26ee4aa3ae666bf467

Changes: https://git.openjdk.org/jdk21u-dev/pull/1634/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1634&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340621
  Stats: 500 lines in 5 files changed: 500 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1634.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1634/head:pull/1634

PR: https://git.openjdk.org/jdk21u-dev/pull/1634