[CDI] fix krazo missing bean

[bmarwell]

Here's one way to do it.
Krazo's MvcContextImpl is in an archive without beans.xml, so we need to add a producer (or just extend it).
I got a message the home controller needs to be a bean, too.

Part of the answer from the Stack Overflow question: https://stackoverflow.com/questions/76081454/weld-001408-unsatisfied-dependencies-in-openliberty-with-implicit-bean-scanning/76083634#76083634 (link to answer).