[jdk21u-dev] RFR: 8353293: Open source several swing tests batch4

[Satyen Subramaniam]

Backporting JDK-8353293: Open source several swing tests batch4. Adds five tests for UI functionality. 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 a551cc929426590bfbbcaa4bd8bee5e4e8cfe16d

Changes: https://git.openjdk.org/jdk21u-dev/pull/2117/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2117&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353293
  Stats: 385 lines in 6 files changed: 385 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2117.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2117/head:pull/2117

PR: https://git.openjdk.org/jdk21u-dev/pull/2117