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

compiler/testData/diagnostics/tests/delegatedProperty/inference/labeledDelegatedExpression.kt

@@ -1,9 +1,11 @@
+import kotlin.reflect.KProperty
+
 class A3 {
     val a: String by l@ MyProperty()
 
     class MyProperty<T> {}
 
-    operator fun <T> MyProperty<T>.getValue(thisRef: Any?, desc: PropertyMetadata): T {
+    operator fun <T> MyProperty<T>.getValue(thisRef: Any?, desc: KProperty<*>): T {
         throw Exception("$thisRef $desc")
     }
-}
+}