"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/callableReference/function/abstractClassConstructors.txt

@@ -15,7 +15,7 @@ internal abstract class B {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
 
-internal final annotation class C : kotlin.Annotation {
+kotlin.annotation.annotation() internal final annotation class C : kotlin.Annotation {
     public constructor C()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int