Java 25 for CI builds

[sebersole]

Move from JDK 21 to JDK 25 for CI builds.

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[yrodiere]

Note you will also need to update the Jenkinsfile at the root of the repository:

1. Update DEFAULT_JDK_VERSION, set it to 25.
2. Add new BuildEnvironment( mainJdkVersion: '21', testJdkVersion: '21' ), just below the existing line for JDK 17.

[yrodiere]

Also... you'll probably want to set this to 25, to require JDK 25 being used at build time?

hibernate-orm/gradle.properties

Line 30 in a406357

orm.jdk.min=21

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[sebersole]

Also... you'll probably want to set this to 25, to require JDK 25 being used at build time?

hibernate-orm/gradle.properties

Line 30 in a406357

orm.jdk.min=21

Perhaps? Unfortunately it depends what task(s) you are running. If you run Javadoc, then yes this is true.

I'll change it and see what happens :D

[sebersole]

Also... you'll probably want to set this to 25, to require JDK 25 being used at build time?

hibernate-orm/gradle.properties

Line 30 in a406357

orm.jdk.min=21

Perhaps? Unfortunately it depends what task(s) you are running. If you run Javadoc, then yes this is true.

I'll change it and see what happens :D

The 3 Oracle jobs using Graalvm need Java 21 (or 23, but...). So we have 2 options that I see:

1. Make the change you suggest, which I think is a good one. However, it requires the "hack" of running those 3 Oracle jobs with -Porm.jdk.min=21
2. Keep orm.jdk.min=21 in the settings but add some specific pre-checks to Javadoc tasks that check > 23 is being used.