Update `BeanDefinitionMethodGeneratorFactory` to not implicitly filter
AOT processor beans if they also implement
`BeanRegistrationExcludeFilter`.
Most AOT processor beans generate code that replaces themselves, so
implicitly filtering them is the right thing to do. However, some beans
may need to perform AOT processing and still get registered when the
AOT processed application runs. These beans can now additionally
implement `BeanRegistrationExcludeFilter` to signal that they should
not be implicitly filtered.
Closes gh-28526
6f71328ba6