[jdk21u-dev] RFR: 8335684: Test ThreadCpuTime.java should pause like ThreadCpuTimeArray.java

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle.

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Commit messages:
 - Backport 1f6e106b45e5109224e13d70f1a40c9e666ec2ab

Changes: https://git.openjdk.org/jdk21u-dev/pull/1665/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1665&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8335684
  Stats: 12 lines in 1 file changed: 2 ins; 9 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1665.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1665/head:pull/1665

PR: https://git.openjdk.org/jdk21u-dev/pull/1665