annotation() now has no arguments. Syntax migration to Retention / Repeatable / MustBeDocumented combination

Deprecated test for annotation(params) completion deleted. A lot of tests changed.

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

@@ -2,7 +2,9 @@
 target(AnnotationTarget.TYPE, AnnotationTarget.CLASSIFIER,
        AnnotationTarget.CONSTRUCTOR, AnnotationTarget.FUNCTION,
        AnnotationTarget.EXPRESSION, AnnotationTarget.PROPERTY)
-annotation(repeatable = true, retention = AnnotationRetention.SOURCE) class Ann(val x: Int = 6)
+@Retention(AnnotationRetention.SOURCE)
+@Repeatable
+annotation class Ann(val x: Int = 6)
 
 @Ann(1) @Ann(2) @Ann(3) @private class A @Ann constructor() {
     @Ann(x = 5) fun foo() {