Introduce KAnnotatedElement and val annotations: List<Annotation>

compiler/testData/codegen/boxWithStdlib/reflection/annotations/propertyWithoutBackingField.kt

@@ -0,0 +1,9 @@
+annotation class Ann(val value: String)
+
+@Ann("OK")
+val property: String
+    get() = ""
+
+fun box(): String {
+    return (::property.annotations.single() as Ann).value
+}