RFR: 8354701: Open source few JToolTip tests

[Alexander Zvegintsev]

Few more tests are open sourced:

- javax/swing/JToolTip/4225314/bug4225314.java manual
- javax/swing/JToolTip/TooltipTest/TooltipTest.java manual
- javax/swing/JToolTip/4255441/bug4255441.java manual

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Commit messages:
 - 8354701: Open source few JToolTip tests

Changes: https://git.openjdk.org/jdk/pull/24708/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24708&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354701
  Stats: 226 lines in 3 files changed: 226 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24708.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24708/head:pull/24708

PR: https://git.openjdk.org/jdk/pull/24708