"annotation" is now parsed as an identifier. It is no longer a soft keyword.

Sometimes it's allowed to parse "annotation" unescaped even if other annotations must be escaped.
A set of annotations and their options tests.
A swarm of existing tests fixed (mostly kotlin.annotation.annotation() added to txt-files).
STUB_VERSION increased. Some quick fixes slightly changed.

compiler/testData/diagnostics/tests/annotations/atAnnotationResolve.txt

@@ -10,7 +10,7 @@ Ann(x = IntegerValueType(1)) Ann(x = IntegerValueType(2)) Ann(x = IntegerValueTy
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
 
-internal final annotation class Ann : kotlin.Annotation {
+kotlin.annotation.annotation() internal final annotation class Ann : kotlin.Annotation {
     public constructor Ann(/*0*/ x: kotlin.Int = ...)
     internal final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean