RFR: 8359114: [s390x] Add z17 detection code

[Manjunath S Matti.]

Add support to detect the new generation of Z machine (z17).

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Commit messages:
 - Add support to detect the new generation of Z machine (z17).

Changes: https://git.openjdk.org/jdk/pull/25718/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25718&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8359114
  Stats: 19 lines in 2 files changed: 12 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/25718.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25718/head:pull/25718

PR: https://git.openjdk.org/jdk/pull/25718