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/reflection/annotations/annotationRetentionAnnotation.kt

@@ -1,15 +1,14 @@
 import kotlin.test.assertEquals
 
-annotation(retention = AnnotationRetention.RUNTIME) class Anno
+@Retention(AnnotationRetention.RUNTIME)
+annotation class Anno
 
 fun box(): String {
     val a = Anno::class.annotations
-/*
-    // TODO: support kotlin.annotation.annotation
+
     if (a.size() != 1) return "Fail 1: $a"
-    val ann = a.single() as? annotation ?: return "Fail 2: ${a.single()}"
-    assertEquals(AnnotationRetention.RUNTIME, ann.retention)
-*/
-    assert(a.isEmpty())
+    val ann = a.single() as? Retention ?: return "Fail 2: ${a.single()}"
+    assertEquals(AnnotationRetention.RUNTIME, ann.value)
+
     return "OK"
 }