RFR: 8310201: Reduce verbose locale output in -XshowSettings launcher option [v2]

[Sean Coffey]

> Simple tweak to remove the "available locales" section from default `-XshowSettings` output.
> 
> Instead, it remains available with the `-XshowSettings:locale` option

Sean Coffey has updated the pull request incrementally with one additional commit since the last revision:

  review feedback and bug id added to test

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14885/files
  - new: https://git.openjdk.org/jdk/pull/14885/files/0366dcc5..2aeec368

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14885&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14885&range=00-01

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 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