<i18n dev> RFR: 8304982: Emit warning for removal of `COMPAT` provider [v3]

Tue Apr 4 17:30:00 UTC 2023

> This is a precursor to the future removal of the `COMPAT` locale data provider. Before the actual removal of the provider, warn the users who explicitly specify `COMPAT` at the command line in order for their smooth migration to CLDR. A CSR has also been drafted.

Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:

  Removed @implNote for now

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13302/files
  - new: https://git.openjdk.org/jdk/pull/13302/files/d613600f..5eeb1ab0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13302&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13302&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13302.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13302/head:pull/13302

PR: https://git.openjdk.org/jdk/pull/13302