[jdk21u-dev] RFR: 8353589: Open source a few Swing menu-related tests

[Satyen Subramaniam]

Backporting JDK-8353589: Open source a few Swing menu-related tests. Adds three menu related tests. 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 98dac46aac2cea9790c1275208cc4c92e8e9a98a

Changes: https://git.openjdk.org/jdk21u-dev/pull/2143/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2143&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353589
  Stats: 294 lines in 3 files changed: 294 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2143.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2143/head:pull/2143

PR: https://git.openjdk.org/jdk21u-dev/pull/2143