[jdk21u-dev] RFR: 8337810: ProblemList BasicDirectoryModel/LoaderThreadCount.java on Windows

[Goetz Lindenmaier]

Bringing this to 21 as we see the failure there, too.

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Commit messages:
 - Backport f92c60e1a9968620cbc92b52aa546b57c09da487

Changes: https://git.openjdk.org/jdk21u-dev/pull/1130/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1130&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8337810
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1130.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1130/head:pull/1130

PR: https://git.openjdk.org/jdk21u-dev/pull/1130