RFR: 8353304: Open source two JTabbedPane tests

[Phil Race]

Open source two Swing JTabbedPane tests.
One is problem listed for macOS because of the way Aqua displays tabs on the left + right.

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Commit messages:
 - 8353304

Changes: https://git.openjdk.org/jdk/pull/24461/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24461&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353304
  Stats: 363 lines in 3 files changed: 363 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24461.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24461/head:pull/24461

PR: https://git.openjdk.org/jdk/pull/24461