[jdk21u-dev] RFR: 8341257: Open source few DND tests - Set1

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle

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Commit messages:
 - Backport cd4981c29245b4ddd37b49aef1a051e29a1001f9

Changes: https://git.openjdk.org/jdk21u-dev/pull/1638/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1638&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341257
  Stats: 1303 lines in 6 files changed: 1303 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1638.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1638/head:pull/1638

PR: https://git.openjdk.org/jdk21u-dev/pull/1638