[jdk21u-dev] RFR: 8340332: Open source mixed AWT tests - Set3

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle

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Commit messages:
 - Backport bfdeb33e6f1d4f9f0cc65925ea792be98b1f4d61

Changes: https://git.openjdk.org/jdk21u-dev/pull/1682/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1682&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340332
  Stats: 364 lines in 3 files changed: 364 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1682.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1682/head:pull/1682

PR: https://git.openjdk.org/jdk21u-dev/pull/1682