RFR: 8256302: releasing oopStorage when deflating allows for faster deleting [v3]

[Daniel D. Daugherty]

> Releasing ObjectMonitor oopStorage earlier when deflating allows ObjectMonitor
> deletion by a JavaThread (usually the MonitorDeflationThread) to happen while a
> ThreadBlockInVM helper is in place. This should improve time-to-safepoint.

Daniel D. Daugherty has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Merge tag 'jdk-21+23' into JDK-8256302
   
   Added tag jdk-21+23 for changeset 6d4782bc
 - address the easy dholmes and kimbarrett CR comments
 - 8256302: releasing oopStorage when deflating allows for faster deleting

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Changes: https://git.openjdk.org/jdk/pull/11296/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11296&range=02
  Stats: 41 lines in 3 files changed: 31 ins; 1 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/11296.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/11296/head:pull/11296

PR: https://git.openjdk.org/jdk/pull/11296