ArC - Optimize `Beans#getCallbacks()`

[gsmet]

Beans#getCallbacks() is called several times, as part of generating the bean bytecode support code and also as part of BeanInfo#hasDestroyLogic().

Moreover, I suspect collectCallbacks could be optimized by getting the AnnotationInstances for the whole class instead of testing each method separately.

So two things:

• Should these callbacks be part of BeanInfo or BeanDeployment and collected once and for all?
• Iterating over all the methods is probably a bad idea given we have Jandex around and it can get us all the class annotations in one go i.e. use ClassInfo#annotations(DotName name).

I'm not doing this now as @Ladicek is working on rewriting ArC to Gizmo 2 so I prefer not be in his way. It's probably worth some discussion for the first item anyway.

[quarkus-bot]

/cc @Ladicek (arc), @manovotn (arc), @mkouba (arc)