[jdk21u-dev] RFR: 8340809: Open source few more AWT PopupMenu tests

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle

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Commit messages:
 - Backport 313f4a962148331c9958618054109284470d1c9f

Changes: https://git.openjdk.org/jdk21u-dev/pull/1517/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1517&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340809
  Stats: 680 lines in 5 files changed: 680 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1517.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1517/head:pull/1517

PR: https://git.openjdk.org/jdk21u-dev/pull/1517