Remove use-site targeted annotations from LazyAnnotations

LazyAnnotations are only used for classes and files, and in the latter
case it will now contain file annotations as normal annotations, without
the target "file:"

compiler/testData/diagnostics/tests/annotations/withUseSiteTarget/FieldAnnotations.txt

@@ -15,7 +15,7 @@ public final class CustomDelegate {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
 
-public final class SomeClass {
+@Ann public final class SomeClass {
     public constructor SomeClass()
     protected final val delegatedProperty: kotlin.String
     public final val propertyWithCustomGetter: kotlin.Int