[jdk21u-dev] RFR: 8315600: Open source few more headless Swing misc tests

[Amos Shi]

Backport of [JDK-8315600](https://bugs.openjdk.org/browse/JDK-8315600)

Testing
- Local: Test passed on MacOS M1 Laptop
  - bug4210354.java - Test results: passed: 1
  - bug4706533.java - Test results: passed: 1
  - bug4992178.java - Test results: passed: 1
- Pipeline: 
- Testing Machine:

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Commit messages:
 - Backport b05198a4f354934bc344fe9cbc19d98fd8bc3977

Changes: https://git.openjdk.org/jdk21u-dev/pull/209/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=209&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315600
  Stats: 209 lines in 3 files changed: 209 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/209.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/209/head:pull/209

PR: https://git.openjdk.org/jdk21u-dev/pull/209