[jdk21u] RFR: 8219652: [aix] Tests failing with JNI attach problems.

[Christoph Langer]

Hi all,

This pull request contains a backport of [JDK-8219652](https://bugs.openjdk.org/browse/JDK-8219652) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

I also add [JDK-8317136](https://bugs.openjdk.org/browse/JDK-8317136) and [JDK-8317790](https://bugs.openjdk.org/browse/JDK-8317790) inline which fix a test exclusion.

Other than the additions, the changes apply clean.

Thanks!

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Commit messages:
 - Add exclusion from JDK-8317136/JDK-8317790
 - Backport 0b0f8b55a6becff269ecf7aa19db12e998e238cd

Changes: https://git.openjdk.org/jdk21u/pull/240/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=240&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8219652
  Stats: 20 lines in 3 files changed: 10 ins; 4 del; 6 mod
  Patch: https://git.openjdk.org/jdk21u/pull/240.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/240/head:pull/240

PR: https://git.openjdk.org/jdk21u/pull/240