RFR: 8310201: Reduce verbose locale output in -XshowSettings launcher option

[Sean Coffey]

Simple tweak to remove the "available locales" section from default `-XshowSettings` output.

Instead, it remains available with the `-XshowSettings:locale` option

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Commit messages:
 - 8310201

Changes: https://git.openjdk.org/jdk/pull/14885/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14885&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310201
  Stats: 21 lines in 2 files changed: 15 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/14885.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14885/head:pull/14885

PR: https://git.openjdk.org/jdk/pull/14885