RFR: 8368818: Deduplicate dtrace macros in objectMonitor and synchronizer

[Francesco Andreuzzi]

I propose to move the following macros and constants definition to `objectMonitor.hpp`:

DTRACE_MONITOR_PROBE_COMMON
DTRACE_MONITOR_WAIT_PROBE
DTRACE_MONITOR_PROBE
HOTSPOT_MONITOR_notify
HOTSPOT_MONITOR_notifyAll

They are defined both in `objectMonitor.cpp` and `synchronizer.cpp`.

Passes tier1 (fastdebug) with `--enable-jvm-feature-dtrace`.

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Commit messages:
 - cc
 - dedup

Changes: https://git.openjdk.org/jdk/pull/27538/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27538&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8368818
  Stats: 137 lines in 3 files changed: 46 ins; 91 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27538.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27538/head:pull/27538

PR: https://git.openjdk.org/jdk/pull/27538