[jdk17u-dev] RFR: 8273526: Extend the OSContainer API pids controller with pids.current

[Matthias Baesken]

8273526: Extend the OSContainer API  pids controller with pids.current

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Commit messages:
 - Backport d4546b6b36f9dc9ff3d626f8cfe62b62daa0de01

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/87/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=87&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273526
  Stats: 88 lines in 14 files changed: 85 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/87.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/87/head:pull/87

PR: https://git.openjdk.java.net/jdk17u-dev/pull/87