Add bytecode listing test on private default setter

Also fix test data of the kotlinp test and remove the newly added test
case in the obsolete PropertyGenTest

 #KT-20344 Fixed

compiler/testData/codegen/bytecodeListing/privateDefaultSetter.kt

@@ -0,0 +1,16 @@
+open class Test {
+    var publicProperty: String = ""
+        private set
+
+    protected var protectedProperty: String = ""
+        private set
+
+    internal var internalProperty: String = ""
+        private set
+
+    fun update(i: Int) {
+        publicProperty = i.toString()
+        protectedProperty = i.toString()
+        internalProperty = i.toString()
+    }
+}