[jdk23u] RFR: 8339487: ProcessHandleImpl os_getChildren sysctl call - retry in case of ENOMEM and enhance exception message

[Matthias Baesken]

8339487: ProcessHandleImpl os_getChildren sysctl call - retry in case of ENOMEM and enhance exception message

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Commit messages:
 - Backport 4ff72dc57e65e99b129f0ba28196994edf402018

Changes: https://git.openjdk.org/jdk23u/pull/123/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk23u&pr=123&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339487
  Stats: 29 lines in 2 files changed: 11 ins; 1 del; 17 mod
  Patch: https://git.openjdk.org/jdk23u/pull/123.diff
  Fetch: git fetch https://git.openjdk.org/jdk23u.git pull/123/head:pull/123

PR: https://git.openjdk.org/jdk23u/pull/123