RFR: 8344381: [s390x] Test failures with error: Register type is not known [v3]

[Amit Kumar]

> Adds SaveLiveRegister portion for vector registers also. 
> 
> Depends on https://github.com/openjdk/jdk/pull/22190. Once that PR gets integrated, will rebase and mark it ready for review.

Amit Kumar has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Merge branch 'master' into v_test_failure_v0
 - additional changes
 - suggestion from martin
 - no more ignoring vector registers
   
   fix'

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22197/files
  - new: https://git.openjdk.org/jdk/pull/22197/files/c6928c4b..b7b00aaa

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22197&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22197&range=01-02

  Stats: 4527 lines in 204 files changed: 106 ins; 3465 del; 956 mod
  Patch: https://git.openjdk.org/jdk/pull/22197.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22197/head:pull/22197

PR: https://git.openjdk.org/jdk/pull/22197