RFR: 8354448: [REDO] Remove friends for ObjectMonitor

[Coleen Phillimore]

This is a redo of the trivial change that failed.  The second commit is the method I should have added.
Tested with tier1-4, where tier3 has the code to exercise LockingMode=1.
Thanks,
Coleen

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Commit messages:
 - 8354448: [REDO] Remove friends for ObjectMonitor
 - Revert "8354446: [BACKOUT] Remove friends for ObjectMonitor"

Changes: https://git.openjdk.org/jdk/pull/24626/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24626&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354448
  Stats: 14 lines in 3 files changed: 7 ins; 5 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/24626.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24626/head:pull/24626

PR: https://git.openjdk.org/jdk/pull/24626