Simplify property hierarchy in reflection

Leave only 3*2 = 6 classes: KProperty0, KProperty1, KProperty2 and their
mutable analogs, depending on the number of receivers a property takes

compiler/testData/diagnostics/tests/callableReference/property/kt7945_unrelatedClass.txt

@@ -1,6 +1,6 @@
 package
 
-internal fun OtherClass.test(/*0*/ prop: kotlin.reflect.KMemberProperty<TestClass, kotlin.Int>): kotlin.Unit
+internal fun OtherClass.test(/*0*/ prop: kotlin.reflect.KProperty1<TestClass, kotlin.Int>): kotlin.Unit
 
 internal open class OtherClass {
     public constructor OtherClass()