[jdk19] RFR: 8290889: JDK 19 RDP2 L10n resource files update - msgdrop 10

open l10n msg drop All tests passed. - Commit messages: - open l10n drop Changes: https://git.openjdk.org/jdk19/pull/154/files Webrev: https://webrevs.openjdk.org/?repo=jdk19&pr=154&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8290889 Stats: 3930 lines in 44 files change

RFR: 8289227: Support for BCP 47 Extension T - Transformed Content

This PR is to propose supporting the `T` extension to the BCP 47 to which `java.util.Locale` class conforms. There are two extensions to the BCP 47, one is `Unicode Locale Extension` which has been supported since JDK7, the other is this `Transformed Content` extension. A CSR has also been draft