[jdk21u-dev] RFR: 8353011: Open source Swing JButton tests - Set 1

[Satyen Subramaniam]

Backporting JDK-8353011: Open source Swing JButton tests - Set 1. Adds five swing tests (JButton, JRadioButton, JTable). Ran GHA Sanity Checks, local Tier 1 and 2, and new tests directly. Patch is clean. Backporting for parity with Oracle.

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Commit messages:
 - Backport f7155183d7f7c6fcea2090f906de69e02973a6d9

Changes: https://git.openjdk.org/jdk21u-dev/pull/2223/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2223&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353011
  Stats: 454 lines in 5 files changed: 454 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2223.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2223/head:pull/2223

PR: https://git.openjdk.org/jdk21u-dev/pull/2223