RFR: 8339416: [s390x] Provide implementation for resolve_global_jobject

[Amit Kumar]

This PR provides "resolve_global_jobject" method implementation for s390x-port. 

Testing:
* Tier1 test with Fastdebug; 
* Added these changes on top of https://github.com/openjdk/jdk/pull/20479 and modified the call in the stubGenerator_s390.cpp file; 
*  1. Ran tier1 test with a call to  "resolve_jobect"
*  2. Ran tier1 test with a call to  "resolve_global_jobject" 

I didn't see any new failure appearing there.

-------------

Commit messages:
 - implement resolve_global_jobject

Changes: https://git.openjdk.org/jdk/pull/20986/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20986&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339416
  Stats: 62 lines in 4 files changed: 55 ins; 4 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/20986.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20986/head:pull/20986

PR: https://git.openjdk.org/jdk/pull/20986