RFR: 8330206: Bump minimum boot jdk to JDK 23

[Mikael Vidstedt]

With the JDK 23 GA out it's time to bump the minimum boot JDK version for mainline/JDK 24.

Testing: tier1-5, GHA

-------------

Commit messages:
 - 8330206: Bump minimum boot jdk to JDK 23

Changes: https://git.openjdk.org/jdk/pull/21296/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21296&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330206
  Stats: 13 lines in 3 files changed: 0 ins; 0 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/21296.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21296/head:pull/21296

PR: https://git.openjdk.org/jdk/pull/21296