[jdk17u-dev] RFR: 8302635: Race condition in HttpBodySubscriberWrapper when cancelling request

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

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Commit messages:
 - Backport edf238b65e441a1d626f3a4ba06170badd05ca7c

Changes: https://git.openjdk.org/jdk17u-dev/pull/3690/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3690&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8302635
  Stats: 235 lines in 4 files changed: 190 ins; 22 del; 23 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3690.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3690/head:pull/3690

PR: https://git.openjdk.org/jdk17u-dev/pull/3690