[jdk21u-dev] RFR: 8372321: TestBackToBackSensitive fails intermittently after JDK-8365972

[Goetz Lindenmaier]

I backport this for parity with 21.0.11-oracle

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Commit messages:
 - Backport 556bddfd9439d1bad698ab5134317ce263a36b04

Changes: https://git.openjdk.org/jdk21u-dev/pull/2578/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2578&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372321
  Stats: 47 lines in 1 file changed: 21 ins; 14 del; 12 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2578.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2578/head:pull/2578

PR: https://git.openjdk.org/jdk21u-dev/pull/2578