RFR: 8353589: Open source a few Swing menu-related tests [v2]

[Phil Race]

> Open source a few tests related to Swing menus.

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8353589

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24457/files
  - new: https://git.openjdk.org/jdk/pull/24457/files/d58812cc..8a89a142

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24457&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24457&range=00-01

  Stats: 6 lines in 3 files changed: 0 ins; 3 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/24457.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24457/head:pull/24457

PR: https://git.openjdk.org/jdk/pull/24457