[jdk21u-dev] RFR: 8256211: assert fired in java/net/httpclient/DependentPromiseActionsTest (infrequent)

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle.

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Commit messages:
 - Backport b1163bcc88a5b88b9a56d5584310f1d679690ab2

Changes: https://git.openjdk.org/jdk21u-dev/pull/1509/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1509&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8256211
  Stats: 22 lines in 1 file changed: 17 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1509.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1509/head:pull/1509

PR: https://git.openjdk.org/jdk21u-dev/pull/1509