[jdk21u-dev] RFR: 8310201: Reduce verbose locale output in -XshowSettings launcher option

[Andrew Lu]

I backport this for parity with 21.0.5-oracle.

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Commit messages:
 - Backport f6e23ae4519f8eb877ae28a0bfbb4820c9718f91

Changes: https://git.openjdk.org/jdk21u-dev/pull/623/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=623&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310201
  Stats: 22 lines in 2 files changed: 15 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/623.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/623/head:pull/623

PR: https://git.openjdk.org/jdk21u-dev/pull/623