RFR: 8339984: Open source AWT MenuItem related tests

[Abhishek Kumar]

Few AWT MenuItem related tests are converted from applet to manual and moved to open.

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Commit messages:
 - MenuItem test moved to open

Changes: https://git.openjdk.org/jdk/pull/21029/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21029&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339984
  Stats: 461 lines in 5 files changed: 461 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21029.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21029/head:pull/21029

PR: https://git.openjdk.org/jdk/pull/21029