This commit extracts AnnotatedElementAdapter from TypeDescriptor and
introduces it as a public, top-level type in the
org.springframework.core.annotation package, and
AnnotatedElementUtils.forAnnotations() now returns an instance of
AnnotatedElementAdapter instead of AnnotatedElementForAnnotations which
has been removed.
In addition, this commit adds missing Javadoc for
AnnotatedElementAdapter and refines some of the implementation.
Closes gh-34628
cc9b39b53f