Provide a way to easily configure injection point of an InjectionTarget

Creating an InjectionTarget requires an AnnotatedType. It is often convenient to create a custom AnnotatedType to add injection points in it (i.e. add @Inject on fields or methods).
We Introduced the AnnotatedTypeConfigurator helper but didn't provide a way to use it to create an InjectionTarget.
I think we should add BeanManager.createAnnotatedTypeConfigurator() to solve this and perhaps simplify other places where we could use an AnnotatedTypeConfigurator like in CDI-642