[jdk17u-dev] RFR: 8305950: Have -XshowSettings option display tzdata version

[Martin Doerr]

Backport of [JDK-8305950](https://bugs.openjdk.org/browse/JDK-8305950). Applies cleanly except Copyright year update.

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Commit messages:
 - Backport 07f55c5ea280032b72247049223f676424aa44c0

Changes: https://git.openjdk.org/jdk17u-dev/pull/1502/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1502&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305950
  Stats: 9 lines in 2 files changed: 6 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1502.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1502/head:pull/1502

PR: https://git.openjdk.org/jdk17u-dev/pull/1502