[jdk21u] 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. 

GH Actions are passing

A local run exposed the same subset of failing jtreg tier1 tests and on the master branch. Those failures are unrelated:

java/foreign/nested/TestNested.java:
PaddingLayout is a preview API and is disabled by default.

compiler/escapeAnalysis/TestFindInstMemRecursion.java:
test result: Failed. Execution failed: `main' threw exception: java.awt.AWTError: Can't connect to X11 window server using ':0' as the value of the DISPLAY variable.

// error, timeout
serviceability/sa/ClhsdbPstack.java#core
serviceability/sa/ClhsdbPstack.java#process
serviceability/sa/TestJhsdbJstackMixed.java

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Commit messages:
 - Backport f318868268f32934a2f0c4e26a6c75360d8e74b1

Changes: https://git.openjdk.org/jdk21u/pull/465/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=465&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/jdk21u/pull/465.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/465/head:pull/465

PR: https://git.openjdk.org/jdk21u/pull/465