[jdk21u-dev] RFR: 8317522: Test logic for BODY_CF in AbstractThrowingSubscribers.java is wrong

[Goetz Lindenmaier]

I backport this for parity with 21.0.3-oracle.

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Commit messages:
 - Backport 4c5b66dceab15ce27f742c4173e14156249eb61a

Changes: https://git.openjdk.org/jdk21u-dev/pull/171/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=171&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8317522
  Stats: 82 lines in 1 file changed: 55 ins; 11 del; 16 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/171.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/171/head:pull/171

PR: https://git.openjdk.org/jdk21u-dev/pull/171