RFR: 8474: Eclipse platform upgrade to 2025_09

Tue Dec 2 15:57:57 UTC 2025

Upgraded Eclipse Traget Platform to 2025-09.
Upgraded Jetty version to 12.1.0 to keep the same jetty version as presnt in eclipse.

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Commit messages:
 - Eclipse platform upgrade to 2025_09

Changes: https://git.openjdk.org/jmc/pull/687/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=687&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8474
  Stats: 407 lines in 11 files changed: 100 ins; 268 del; 39 mod
  Patch: https://git.openjdk.org/jmc/pull/687.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/687/head:pull/687

PR: https://git.openjdk.org/jmc/pull/687