[jdk21u-dev] RFR: 8354878: File Leak in CgroupSubsystemFactory::determine_type of cgroupSubsystem_linux.cpp:300

[Severin Gehwolf]

Clean backport as a follow-up to JDK-8349988 which is in JDK 21.0.10. Copyright needed manual resolve.

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Commit messages:
 - Backport 7f3191a630edba32ddb7bb64a835ec663d91ed92

Changes: https://git.openjdk.org/jdk21u-dev/pull/2531/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2531&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354878
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2531.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2531/head:pull/2531

PR: https://git.openjdk.org/jdk21u-dev/pull/2531