RFR: 8338658: New Object to ObjectMonitor mapping: s390x implementation

[Amit Kumar]

s390x implementation of [JDK-8315884](https://bugs.openjdk.org/browse/JDK-8315884) New Object to ObjectMonitor mapping; 

Testing: 
- tier1-test (fastdebug)
- tier1-test with UseObjectMonitorTable

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Commit messages:
 - s390-port

Changes: https://git.openjdk.org/jdk/pull/20740/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20740&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338658
  Stats: 169 lines in 7 files changed: 94 ins; 23 del; 52 mod
  Patch: https://git.openjdk.org/jdk/pull/20740.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20740/head:pull/20740

PR: https://git.openjdk.org/jdk/pull/20740