[jdk21u-dev] RFR: 8353661: Open source several swing tests batch5

[Elif Aslan]

Clean backport.Open-sourcing and standardizing several tests (windows & JSlider).Testing is successfull and new tests passes.

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Commit messages:
 - Backport 924638c471b0bf4a00a890ce6a3fd7e118cdd578

Changes: https://git.openjdk.org/jdk21u-dev/pull/2469/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2469&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353661
  Stats: 436 lines in 4 files changed: 436 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2469.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2469/head:pull/2469

PR: https://git.openjdk.org/jdk21u-dev/pull/2469