RFR: 8325883: Move Monitor Deflation reporting out of safepoint cleanup [v2]

[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.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Remove old spin-locking comment

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18528/files
  - new: https://git.openjdk.org/jdk/pull/18528/files/0e3919da..6c7331c4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18528&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18528&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 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