[lworld] RFR: 8354728: [lworld] Langtools work to update strict implementation to latest

[Chen Liang]

The updates to the core libraries + langtools for the latest strict field initialization spec https://cr.openjdk.org/~dlsmith/jep401/jep401-20250409/specs/strict-fields-jvms.html is ready.

Currently, since there is no VM support, testing is restricted to generation by ClassFile API/javac and inspection through ClassFile API (and javap)

Not suitable for integration yet; StrictFinalInstanceFieldsTest requires VM side's support.

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Commit messages:
 - 8354728: [lworld] Langtools work to update strict implementation to latest

Changes: https://git.openjdk.org/valhalla/pull/1432/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1432&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354728
  Stats: 559 lines in 15 files changed: 252 ins; 91 del; 216 mod
  Patch: https://git.openjdk.org/valhalla/pull/1432.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1432/head:pull/1432

PR: https://git.openjdk.org/valhalla/pull/1432