RFR: 8322420: [Linux] cgroup v2: Limits in parent nested control groups are not detected [v12]

[Jan Kratochvil]

> The testcase requires root permissions.
> 
> Designed by  Severin Gehwolf, implemented by Jan Kratochvil.

Jan Kratochvil has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 103 commits:

 - Fix the gtest
 - fix compilation warning
 - fix the gtest
 - less refactorizations
 - remove not a real backward compat.
 - whitespace
 - less refactorizations
 - reduce refactorizations
 - Fix caching
 - Merge branch 'master' into master-cgroup
 - ... and 93 more: https://git.openjdk.org/jdk/compare/537d20af...060e7688

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Changes: https://git.openjdk.org/jdk/pull/17198/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17198&range=11
  Stats: 793 lines in 16 files changed: 492 ins; 225 del; 76 mod
  Patch: https://git.openjdk.org/jdk/pull/17198.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17198/head:pull/17198

PR: https://git.openjdk.org/jdk/pull/17198