RFR: 8253727: [cgroups v2] Memory and swap limits reported incorrectly [v5]

[Severin Gehwolf]

> Account for interface files for swap and memory being reported independently.
> The cgroup v1-like value is now reported by adding the memory.max value to
> the memory.swap.max value.
> 
> Testing: Container tests on Linux x86_64 on cgroups v2 with crun 0.15

Severin Gehwolf has refreshed the contents of this pull request, and previous commits have been removed. The
incremental views will show differences compared to the previous content of the PR. The pull request contains one new
commit since the last revision:

  8253727: [cgroups v2] Memory and swap limits reported incorrectly

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/384/files
  - new: https://git.openjdk.java.net/jdk/pull/384/files/cc9b1087..f4c8678f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=384&range=04
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=384&range=03-04

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/384.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/384/head:pull/384

PR: https://git.openjdk.java.net/jdk/pull/384