Change wording in ATD/BBD#addAnnotatedType() to correspond with how archive trimming is worded.

[manovotn]

Fixes #939

Current wording of bean archive trimming is (emphasis mine):

If an explicit bean archive contains the element in its beans.xml file, types that don’t have either a bean defining annotation (as defined in Bean defining annotations) or any scope annotation, are removed from the set of discovered types.

This PR suggest a slight change to wording of BeforeBeanDiscovery/AfterTypeDiscovery#addAnnotatedType so that it is clearly implied that even added synthetic types are part of the 'set of discovered types' and hence subject to archive trimming.

Note that when it comes to BCE, there is ScannedClasses which already uses this kind of wording:

Allows adding additional classes to the set of types discovered during type discovery.

[Ladicek]

For the record, this PR looks good to me otherwise :-) If you feel like my wording is overly verbose, I think I can accept that, if we unify ScannedClasses :-)

[manovotn]

I have changed the wording as agreed.
This PR should be good to go now.

[manovotn]

Thank you for reviews.
I have pushed the TCKs as well - jakartaee/cdi-tck#681