RFR: 8404: Update to Eclipse 2025-06

[Virag Purnam]

Eclipse platform updated to 2025-06
Jetty version to 12.0.21 (Eclipse uses 12.0.21)
ASM version to 9.8 (Eclipse uses 9.8)

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Commit messages:
 - 8404: Update to Eclipse 2025-06

Changes: https://git.openjdk.org/jmc/pull/655/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=655&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8404
  Stats: 160 lines in 10 files changed: 120 ins; 0 del; 40 mod
  Patch: https://git.openjdk.org/jmc/pull/655.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/655/head:pull/655

PR: https://git.openjdk.org/jmc/pull/655