[jdk21u-dev] RFR: 8350224: Test javax/swing/JComboBox/TestComboBoxComponentRendering.java fails in ubuntu 23.x and later

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle

Test not in ProblemList, omitted corresponding hunk.

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Commit messages:
 - Backport 4de92a40d0750a2e6f72eb675d900f1129718d39

Changes: https://git.openjdk.org/jdk21u-dev/pull/1707/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1707&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8350224
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1707.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1707/head:pull/1707

PR: https://git.openjdk.org/jdk21u-dev/pull/1707