<i18n dev> RFR: 8358095: Cleanup tests with explicit locale provider set to only CLDR

[Justin Lu]

Please review this PR which cleans up some i18n tests.

There are some i18n related tests that set the locale provider to CLDR (and only CLDR). Since JDK9, this is redundant and equivalent to the default. Thus, occurrences of "-Djava.locale.providers=CLDR" are just extra noise for these tests. 

As this change is trivial cleanup, bug IDs are not updated in this change.

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Commit messages:
 - init

Changes: https://git.openjdk.org/jdk/pull/25532/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25532&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8358095
  Stats: 40 lines in 21 files changed: 0 ins; 1 del; 39 mod
  Patch: https://git.openjdk.org/jdk/pull/25532.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25532/head:pull/25532

PR: https://git.openjdk.org/jdk/pull/25532