[jdk21u-dev] RFR: 8315669: Open source several Swing PopupMenu related tests

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle

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Commit messages:
 - Backport 7c5f2a2db941d30a5425d358607a6b4e63879ab7

Changes: https://git.openjdk.org/jdk21u-dev/pull/1514/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1514&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315669
  Stats: 750 lines in 6 files changed: 750 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1514.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1514/head:pull/1514

PR: https://git.openjdk.org/jdk21u-dev/pull/1514