[jdk23u] RFR: 8332113: Update nsk.share.Log to be always verbose

[Mimoun Ghordou]

Tested Tier1

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Commit messages:
 - 8332113: Update nsk.share.Log to be always verbose
 - 8330702: Update failure handler to don't generate Error message if cores actions are empty

Changes: https://git.openjdk.org/jdk23u/pull/8/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk23u&pr=8&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332113
  Stats: 19 lines in 3 files changed: 5 ins; 4 del; 10 mod
  Patch: https://git.openjdk.org/jdk23u/pull/8.diff
  Fetch: git fetch https://git.openjdk.org/jdk23u.git pull/8/head:pull/8

PR: https://git.openjdk.org/jdk23u/pull/8