RFR: 7903671: jcstress: Update buffer tests for JDK-8318966 [v2]

[Jiří Vaněk]

> part 1:  Detecting jdk of target VM and exuding illegible tests
> 
> This is prequel to full fixing of CODETOOLS-7903671. This PR detects target JDK version and then disables illegible tests.
> part 2 will be done in templates of affected tests and logic around generating the classes from them. In meantime this should server.
> 
> The jdk detection will be most likely used anyway. WDYT? If we agree on similar approach, I will create a new bug for this PR only.

Jiří Vaněk has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:

 - Excluding jdk23+ illegible tests on jdk23+
 - Added  detection on target JDK version

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Changes: https://git.openjdk.org/jcstress/pull/159/files
  Webrev: https://webrevs.openjdk.org/?repo=jcstress&pr=159&range=01
  Stats: 125 lines in 3 files changed: 119 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jcstress/pull/159.diff
  Fetch: git fetch https://git.openjdk.org/jcstress.git pull/159/head:pull/159

PR: https://git.openjdk.org/jcstress/pull/159