[jdk11u-dev] RFR: 8348328: Update IANA Language Subtag Registry to Version 2025-05-15

[Radek Cap]

Backport of JDK-8348328 - Update IANA Language Subtag Registry to Version 2025-05-15

The IANA Functions Operator has updated the language subtag registry to "2025-05-15".

Clean backport.
Passed tier1 tests.
Passed gtests.

GH Actions are passing, Windows failures are unrelated.

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Commit messages:
 - Backport f318868268f32934a2f0c4e26a6c75360d8e74b1

Changes: https://git.openjdk.org/jdk11u-dev/pull/3043/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=3043&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8348328
  Stats: 143 lines in 2 files changed: 135 ins; 1 del; 7 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/3043.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/3043/head:pull/3043

PR: https://git.openjdk.org/jdk11u-dev/pull/3043