[jdk24] RFR: 8345944: JEP 492: extending local class in a different static context should not be allowed

[Maurizio Cimadamore]

8345944: JEP 492: extending local class in a different static context should not be allowed

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Commit messages:
 - Backport 0ad64234e2fd19ec0435fb00340120153b928f9c

Changes: https://git.openjdk.org/jdk/pull/22708/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22708&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345944
  Stats: 275 lines in 6 files changed: 266 ins; 4 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/22708.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22708/head:pull/22708

PR: https://git.openjdk.org/jdk/pull/22708