[jdk17u-dev] RFR: 8266490: Extend the OSContainer API to support the pids controller of cgroups

[Matthias Baesken]

8266490: Extend the OSContainer API to support the pids controller of cgroups

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Commit messages:
 - Backport 089e83bf1bf6f28cec8dd30288720b6d066301f0

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/66/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=66&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266490
  Stats: 555 lines in 22 files changed: 476 ins; 28 del; 51 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/66.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/66/head:pull/66

PR: https://git.openjdk.java.net/jdk17u-dev/pull/66