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

[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.

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Commit messages:
 - no more ignoring vector registers

Changes: https://git.openjdk.org/jdk/pull/22197/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22197&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344381
  Stats: 15 lines in 1 file changed: 11 ins; 0 del; 4 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