[jdk21u-dev] RFR: 8353138: Screen capture for test TaskbarPositionTest.java, failure case

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle.

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Commit messages:
 - Backport 05ff557dee6adc679d85bfe8fb49f69053a6aaba

Changes: https://git.openjdk.org/jdk21u-dev/pull/1647/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1647&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353138
  Stats: 26 lines in 1 file changed: 21 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1647.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1647/head:pull/1647

PR: https://git.openjdk.org/jdk21u-dev/pull/1647