[jdk21u-dev] RFR: 8341000: Open source some of the AWT Window tests

[Goetz Lindenmaier]

I backport this for parity with 17.0.16-oracle.

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Commit messages:
 - Backport d3139b4c3682defab2a8bfa0a24890232c3f00a3

Changes: https://git.openjdk.org/jdk21u-dev/pull/1526/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1526&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341000
  Stats: 172 lines in 2 files changed: 172 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1526.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1526/head:pull/1526

PR: https://git.openjdk.org/jdk21u-dev/pull/1526