RFR: 8325883: Move Monitor Deflation reporting out of safepoint cleanup

[Coleen Phillimore]

Moved monitor logging out of the safepoint cleanup code to intervals in the MonitorDeflationThread, and made logging come out at the specified level (Info, Debug or Trace).

Tested with tier1-4.

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

Commit messages:
 - 8325883: Move Monitor Deflation reporting out of safepoint cleanup

Changes: https://git.openjdk.org/jdk/pull/18528/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18528&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325883
  Stats: 188 lines in 5 files changed: 98 ins; 69 del; 21 mod
  Patch: https://git.openjdk.org/jdk/pull/18528.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18528/head:pull/18528

PR: https://git.openjdk.org/jdk/pull/18528