RFR: 8342984: Bump minimum boot jdk to JDK 24

[Chen Liang]

On Fri, 28 Mar 2025 23:44:19 GMT, Mikael Vidstedt <mikael at openjdk.org> wrote:

> With the JDK 24 GA out it's time to bump the minimum boot JDK version for mainline/JDK 25.
> 
> Testing: tier1-5, GHA

Thanks for this bump.

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Marked as reviewed by liach (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24305#pullrequestreview-2727297093