Fix tests: "infix modifier required" and "operator modifier required" errors

compiler/testData/codegen/boxWithStdlib/callableReference/property/genericProperty.kt

@@ -10,7 +10,7 @@ val <T> Value<T>.additionalText by DVal(Value<T>::text) //works
 val <T> Value<T>.additionalValue by DVal(Value<T>::value) //not work
 
 class DVal<T, R, P: KProperty1<T, R>>(val kmember: P) {
-    fun getValue(t: T, p: KProperty<*>): R {
+    operator fun getValue(t: T, p: KProperty<*>): R {
         return kmember.get(t)
     }
 }