RFR: 8365057: Add support for java.util.concurrent lock information to Thread.dump_to_file [v6]

[Alex Menkov]

> The fix updates `jcmd Thread.dump_to_file`/`HotSpotDiagnosticMXBean.dumpThreads` implementation to report thread which owns parkBlocker.
> 
> Testing: tier1..4,hs-tier5-svc

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

  reverted comment

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/27457/files
  - new: https://git.openjdk.org/jdk/pull/27457/files/bc664ef4..f588a6da

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27457&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27457&range=04-05

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27457.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27457/head:pull/27457

PR: https://git.openjdk.org/jdk/pull/27457