[jdk21u-dev] RFR: 8357910: LoaderConstraintsTest.java fails when run with TEST_THREAD_FACTORY=Virtual

[Goetz Lindenmaier]

I backport this for parity with 21.0.9-oracle.

Resolved ProblemList, probably clean.

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Commit messages:
 - backport 16e120b00842e340401b6930354edfb1515f6ca4

Changes: https://git.openjdk.org/jdk21u-dev/pull/2096/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2096&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357910
  Stats: 13 lines in 2 files changed: 5 ins; 3 del; 5 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2096.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2096/head:pull/2096

PR: https://git.openjdk.org/jdk21u-dev/pull/2096