[jdk21u-dev] RFR: 8322983: Virtual Threads: exclude 2 tests

[SendaoYan]

Hi all,

This pull request contains a backport of commit [cf28fd4c](https://github.com/openjdk/jdk/commit/cf28fd4cbc6507eb69fcfeb33622316eb5b6b0c5) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Evgeny Nikitin on 20 Dec 2024 and was reviewed by Jaikiran Pai, Leonid Mesnik and SendaoYan.

Thanks!

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Commit messages:
 - Backport cf28fd4cbc6507eb69fcfeb33622316eb5b6b0c5

Changes: https://git.openjdk.org/jdk21u-dev/pull/1285/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1285&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8322983
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1285.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1285/head:pull/1285

PR: https://git.openjdk.org/jdk21u-dev/pull/1285