[jdk21u-dev] RFR: 8341162: Open source some of the AWT window test

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle

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Commit messages:
 - Backport c8e70df37ebc90faaffae469244cefa10e8274c1

Changes: https://git.openjdk.org/jdk21u-dev/pull/1629/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1629&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341162
  Stats: 327 lines in 4 files changed: 327 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1629.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1629/head:pull/1629

PR: https://git.openjdk.org/jdk21u-dev/pull/1629