[jdk20] Integrated: 8298987: ProblemList jdk/internal/vm/Continuation/Fuzz.java#default with ZGC on X64

[Daniel D. Daugherty]

A batch of trivial fixes to ProblemList tests:
[JDK-8298987](https://bugs.openjdk.org/browse/JDK-8298987) ProblemList jdk/internal/vm/Continuation/Fuzz.java#default with ZGC on X64
[JDK-8298989](https://bugs.openjdk.org/browse/JDK-8298989) ProblemList vmTestbase/nsk/jvmti/InterruptThread/intrpthrd003/TestDescription.java on macosx-x64
[JDK-8298990](https://bugs.openjdk.org/browse/JDK-8298990) ProblemList java/lang/Thread/virtual/stress/Skynet.java subtests with ZGC

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Commit messages:
 - 8298990: ProblemList java/lang/Thread/virtual/stress/Skynet.java subtests with ZGC
 - 8298989: ProblemList vmTestbase/nsk/jvmti/InterruptThread/intrpthrd003/TestDescription.java on macosx-x64
 - 8298987: ProblemList jdk/internal/vm/Continuation/Fuzz.java#default with ZGC on X64

Changes: https://git.openjdk.org/jdk20/pull/51/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20&pr=51&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298987
  Stats: 5 lines in 2 files changed: 5 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk20/pull/51.diff
  Fetch: git fetch https://git.openjdk.org/jdk20 pull/51/head:pull/51

PR: https://git.openjdk.org/jdk20/pull/51