[jdk21u-dev] RFR: 8370966: Create regression test for the hierarchical memory limit fix in JDK-8370572 [v3]

[Severin Gehwolf]

> Backport of the regression test for https://github.com/openjdk/jdk21u-dev/pull/2532

Severin Gehwolf has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge branch 'master' into jdk-8370966-test-backport
 - Backport c3eecc0465e570dcc19aa1f5bc9ed4db8dcb4e63
 - Backport 5a08f945f250c27afe533ca5a7c796699eb63d91

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Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/2533/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/2533/files/483b4a3e..5e1e3a54

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2533&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2533&range=01-02

  Stats: 5221 lines in 82 files changed: 1305 ins; 3378 del; 538 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2533.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2533/head:pull/2533

PR: https://git.openjdk.org/jdk21u-dev/pull/2533