Add more tests for PropertyAccessorDescriptor.isDeafult() usages

compiler/testData/diagnostics/tests/constructorConsistency/getset.kt

@@ -8,7 +8,16 @@ class My(var x: String) {
 
     val z: String
 
+    var d: String = ""
+        get
+        set
+
+    val z1: String
+
     init {
+        <!DEBUG_INFO_LEAKING_THIS!>d<!> = "d"
+        if (<!DEBUG_INFO_LEAKING_THIS!>d<!> != "") z1 = this.<!DEBUG_INFO_LEAKING_THIS!>d<!> else z1 = <!DEBUG_INFO_LEAKING_THIS!>d<!>
+
         // Dangerous: setter!
         <!DEBUG_INFO_LEAKING_THIS!>y<!> = "x"
         // Dangerous: getter!