[jdk21u-dev] RFR: 8331031: unify os::dont_yield and os::naked_yield across Posix platforms

[Matthias Baesken]

Backport 8331031

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Commit messages:
 - Backport c9442014e561f8e1cb43a0e9f18a9a5ae2a7a2da

Changes: https://git.openjdk.org/jdk21u-dev/pull/598/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=598&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331031
  Stats: 45 lines in 4 files changed: 8 ins; 37 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/598.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/598/head:pull/598

PR: https://git.openjdk.org/jdk21u-dev/pull/598