RFR: 8328747: WrongMethodTypeException with pattern matching on switch on sealed classes

[Aggelos Biboudis]

This PR addresses the issue that the expected signature for `typeSwitch` is different prior JDK 23. The signature, due to JEP 455, needs to be more precise on the `selectorType` now that primitive type support is previewed.

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Commit messages:
 - 8328747: WrongMethodTypeException with pattern matching on switch on sealed classes

Changes: https://git.openjdk.org/jdk/pull/18606/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18606&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328747
  Stats: 137 lines in 3 files changed: 135 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18606.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18606/head:pull/18606

PR: https://git.openjdk.org/jdk/pull/18606