Update compiler tests to use KProperty instead of PropertyMetadata

compiler/testData/codegen/box/delegatedProperty/kt4138.kt

@@ -1,6 +1,8 @@
+import kotlin.reflect.KProperty
+
 class Delegate<T>(var inner: T) {
-    fun getValue(t: Any?, p: PropertyMetadata): T = inner
-    fun setValue(t: Any?, p: PropertyMetadata, i: T) { inner = i }
+    fun getValue(t: Any?, p: KProperty<*>): T = inner
+    fun setValue(t: Any?, p: KProperty<*>, i: T) { inner = i }
 }
 
 
@@ -32,4 +34,4 @@ fun box() : String {
     if (FooTrait.B.f != 12) return "fail 6"
 
     return "OK"
-}
+}