[jdk21u-dev] RFR: 8352908: Open source several swing tests batch1

[Goetz Lindenmaier]

I backport this test change as it also goes to 21.0.9-oracle

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Commit messages:
 - Backport a2dc9c71e47a1cdf70ab351c557a5f1835eb5f4a

Changes: https://git.openjdk.org/jdk21u-dev/pull/1800/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1800&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352908
  Stats: 353 lines in 4 files changed: 353 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1800.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1800/head:pull/1800

PR: https://git.openjdk.org/jdk21u-dev/pull/1800