KAFKA-18356 Explicitly setting up instrumentation for inline mocking (Java 21+)

[m1a2st]

Jira: https://issues.apache.org/jira/browse/KAFKA-18356

Starting from Java 21, the JDK restricts the ability of libraries to attach a Java agent to their own JVM. As a result, the inline-mock-maker might not be able to function without an explicit setup to enable instrumentation, and the JVM will always display a warning.

The mockito document

Test in my local trunk:

this branch:

Committer Checklist (excluded from commit message)

• [ ] Verify design and implementation
• [ ] Verify test coverage and CI build status
• [ ] Verify documentation (including upgrade notes)

[chia7712]

@m1a2st any update?

[m1a2st]

Test in my local

This branch: Main:

[mimaison]

@chia7712 @ijuma Do you want to take another look or have other comments?

[ijuma]

No need to wait for my review @mimaison. Thanks.