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

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

@@ -1,13 +1,15 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
+import kotlin.reflect.KProperty
+
 var a: Int by Delegate()
   <!ACCESSOR_FOR_DELEGATED_PROPERTY!>get() = 1<!>
   <!ACCESSOR_FOR_DELEGATED_PROPERTY!>set(i) {}<!>
 
 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) {}
 }