RFR: 8350482: [s390x] Relativize esp in interpreter frames

[Amit Kumar]

Relativize esp in interpreter frames.

This PR depends on https://github.com/openjdk/jdk/pull/23660 and couple of merge conflicts I expect from https://github.com/openjdk/jdk/pull/23690 and https://github.com/openjdk/jdk/pull/23708.

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Commit messages:
 - Z_R0 usage
 - cleanup
 - Merge branch 'master' into esp_rel
 - sign extension
 - esp relativised

Changes: https://git.openjdk.org/jdk/pull/23724/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23724&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8350482
  Stats: 32 lines in 5 files changed: 17 ins; 8 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/23724.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23724/head:pull/23724

PR: https://git.openjdk.org/jdk/pull/23724