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/codegen/boxWithStdlib/annotations/annotationsOnDefault.kt

@@ -1,6 +1,7 @@
 import kotlin.test.assertEquals
 
-annotation(retention = AnnotationRetention.RUNTIME) class Ann(val x: Int)
+@Retention(AnnotationRetention.RUNTIME)
+annotation class Ann(val x: Int)
 class A {
     Ann(1) fun foo(x: Int, y: Int = 2, z: Int) {}