RFR: 8278411: Implement UseHeavyMonitors consistently, s390 port

[Amit Kumar]

This PR make s390x to adapt the changes done in [JDK-8276901](https://bugs.openjdk.org/browse/JDK-8276901) OR implements UseHeavyMonitors. 

[JDK-8291555](https://bugs.openjdk.org/browse/JDK-8291555) still needs Porting effort. As for `LM_LIGHTWEIGHT` locking mode, code is Unimplemented.

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Commit messages:
 - s390x Port

Changes: https://git.openjdk.org/jdk/pull/13978/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13978&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8278411
  Stats: 97 lines in 5 files changed: 25 ins; 1 del; 71 mod
  Patch: https://git.openjdk.org/jdk/pull/13978.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13978/head:pull/13978

PR: https://git.openjdk.org/jdk/pull/13978