RFR: 7904042: jcstress: Native access warnings when running with JDK 25 [v2]

[Aleksey Shipilev]

> Current jcstress uses JNA for affinity setup. It causes lots of warnings when running with JDK 25.
> 
> This PR tries to fix most of them.

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Fix JNA unpacking
 - Merge branch 'master' into CODETOOLS-7904042-native-access-warnings
 - Fix

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Changes:
  - all: https://git.openjdk.org/jcstress/pull/171/files
  - new: https://git.openjdk.org/jcstress/pull/171/files/66233003..dbf286f7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jcstress&pr=171&range=01
 - incr: https://webrevs.openjdk.org/?repo=jcstress&pr=171&range=00-01

  Stats: 372 lines in 16 files changed: 242 ins; 88 del; 42 mod
  Patch: https://git.openjdk.org/jcstress/pull/171.diff
  Fetch: git fetch https://git.openjdk.org/jcstress.git pull/171/head:pull/171

PR: https://git.openjdk.org/jcstress/pull/171