[jdk21u-dev] RFR: 8342508: Use latch in BasicMenuUI/bug4983388.java instead of delay

[Goetz Lindenmaier]

I backport this for parity with 21.0.7-oracle

-------------

Commit messages:
 - Backport 02ec8ca2d6ccbabc6740b60be8fe1f8b2110f0ca

Changes: https://git.openjdk.org/jdk21u-dev/pull/1326/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1326&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342508
  Stats: 49 lines in 1 file changed: 25 ins; 16 del; 8 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1326.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1326/head:pull/1326

PR: https://git.openjdk.org/jdk21u-dev/pull/1326