RFR: 8334299: Deprecate LockingMode option, along with LM_LEGACY and LM_MONITOR

[Coleen Phillimore]

Add LockingMode to the list of deprecated options and add deprecated message for it.
Tested with tier1-4.

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Commit messages:
 - 8334299: Deprecate LockingMode option, along with LM_LEGACY and LM_MONITOR

Changes: https://git.openjdk.org/jdk/pull/19827/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19827&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334299
  Stats: 5 lines in 3 files changed: 2 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/19827.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19827/head:pull/19827

PR: https://git.openjdk.org/jdk/pull/19827