<i18n dev> RFR: 8284840: Update CLDR to Version 42.0

[Naoto Sato]

This is to update the CLDR data from version 41 to version 42. The vast majority of the changes are basically replacing the CLDR data, along with tools/testcase alignments to those upstream changes:

https://unicode-org.atlassian.net/browse/CLDR-14032 (" at " is no longer used for standard date/time format)
https://unicode-org.atlassian.net/browse/CLDR-14831 (NBSP prefixed to `a`, instead of a normal space )
https://unicode-org.atlassian.net/browse/CLDR-11510 (Fix first day of week info for China (CN))
https://unicode-org.atlassian.net/browse/CLDR-15966 (Japanese: Support numbers up to 9999京)

Here is the link to CLDR v42's release notes: https://cldr.unicode.org/index/downloads/cldr-42

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Commit messages:
 - Merge branch 'master' into cldr+
 - 8284840: Update CLDR to Version 42.0
 - CLDR v42 release
 - v42 beta5
 - v42 beta3
 - v42 beta1
 - v42 alpha
 - alpha1b
 - v42 alpha1b
 - cldr v42 alpha1
 - ... and 3 more: https://git.openjdk.org/jdk/compare/9612cf99...2d86b3c8

Changes: https://git.openjdk.org/jdk/pull/10820/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10820&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8284840
  Stats: 99164 lines in 377 files changed: 68223 ins; 2820 del; 28121 mod
  Patch: https://git.openjdk.org/jdk/pull/10820.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10820/head:pull/10820

PR: https://git.openjdk.org/jdk/pull/10820