RFR: 8374322: TestMemoryWithSubgroups.java fails Permission denied [v3]

[SendaoYan]

> Hi all,
> 
> Test containers/docker/TestMemoryWithSubgroups.java fails on some docker images. If the default user inside docker is non root user, test will report fails "mkdir: cannot create directory '/sys/fs/cgroup/memory': Permission denied". This PR add docker run parameter `--user root` to force use root user inside docker containter.
> 
> Change has been verified locally on ubuntu22(cgroup v2). Test-fix only, no risk.

SendaoYan has updated the pull request incrementally with one additional commit since the last revision:

  Add --user root when start docker container

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/28975/files
  - new: https://git.openjdk.org/jdk/pull/28975/files/0c8f3101..865add95

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28975&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28975&range=01-02

  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/28975.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28975/head:pull/28975

PR: https://git.openjdk.org/jdk/pull/28975