[native-image] The -report-unsupported-elements-at-runtime flag should support missing classes declared in annotations

[graemerocher]

A class not on the classpath but present in an annotation results in

Caused by: java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
	at sun.reflect.annotation.AnnotationParser.parseClassArray(AnnotationParser.java:724)
	at sun.reflect.annotation.AnnotationParser.parseArray(AnnotationParser.java:531)
	at sun.reflect.annotation.AnnotationParser.parseMemberValue(AnnotationParser.java:355)
	at sun.reflect.annotation.AnnotationParser.parseAnnotation2(AnnotationParser.java:286)
	at sun.reflect.annotation.AnnotationParser.parseAnnotations2(AnnotationParser.java:120)

Apart from the fact that it is currently almost impossible to understand what class caused the issue this behaviour is not consistent with the -report-unsupported-elements-at-runtime flag.

The -report-unsupported-elements-at-runtime flag should cause this error to be ported at runtime.

Relates to #470

[cstancu]

This duplicates #597.