Deprecate PropertyMetadata, use KProperty<*> for delegated properties instead

compiler/testData/diagnostics/tests/delegatedProperty/defaultSetter.kt

@@ -1,12 +1,14 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
+import kotlin.reflect.KProperty
+
 var a: Int by Delegate()
     private set
 
 class Delegate {
-    operator fun getValue(t: Any?, p: PropertyMetadata): Int {
+    operator fun getValue(t: Any?, p: KProperty<*>): Int {
         return 1
     }
 
-    operator fun setValue(t: Any?, p: PropertyMetadata, i: Int) {}
-}
+    operator fun setValue(t: Any?, p: KProperty<*>, i: Int) {}
+}