Make it possible to mark beans as unremovable via MP config.

[manovotn]

Fixes #9941

Since we already have UnremovableBeanBuildItem concept that builds custom Predicate<BeanInfo> exclusion formulas, I thought we could just add new config and register it in a similar way. The downside is that we cannot really reuse ArcProcessor#initClassPredicates() because that needs to produce Predicate<ClassInfo>.

But maybe I am just missing a way to simplify that? I don't mind implementing it differently, this just seemed as the easiest way to me :-)

Also, do we need to mind producers and synthetic beans? Because in such case a package/class based expression in config won't do the trick. Or we would need to state that class based expression applies also to any declared producers inside that class. @loicmathieu @mkouba WDYT?

[mkouba]

But maybe I am just missing a way to simplify that?

I think that you should use a similar logic we have for selected alternatives, i.e. collect the class predicates and produce one removal exclusion that iterates over those predicates:

builder.addRemovalExclusion(new Predicate<BeanInfo>() {
   public boolean test(BeanInfo bean) {
      ClassInfo beanClass = bean.getBeanClass();
      // iterate over predicates and test the bean class
   }
}); 

Also, do we need to mind producers and synthetic beans?

#9941 (comment)

"We should also clarify that all beans discovered from the matching type will be unremovable, including all producers declared on that type."

I don't think it makes sense to try to handle synthetic beans.

[loicmathieu]

LGTM.
It's exactly what I expected ;)

[manovotn]

@mkouba how about now?
I also added another test that should cover the producer case (e.g. that you can mark it unremovable based on its return type).

[mkouba]

Looks very good now!