[jdk21u-dev] RFR: 8314136: Test java/net/httpclient/CancelRequestTest.java failed: WARNING: tracker for HttpClientImpl(42) has outstanding operations

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle.

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Commit messages:
 - Backport 4f864faf428c8171be975a79db5bc2bc145f8805

Changes: https://git.openjdk.org/jdk21u-dev/pull/1686/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1686&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314136
  Stats: 37 lines in 1 file changed: 7 ins; 8 del; 22 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1686.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1686/head:pull/1686

PR: https://git.openjdk.org/jdk21u-dev/pull/1686