Add more tests for PropertyAccessorDescriptor.isDeafult() usages

idea/testData/codeInsight/generate/equalsWithHashCode/explicitDefaultAccessors.kt

@@ -0,0 +1,10 @@
+class Test {
+    var serial: String = ""
+        get
+        set
+    var name: String = ""
+        get
+    <caret>
+}
+
+// FORCED

idea/testData/codeInsight/generate/equalsWithHashCode/explicitDefaultAccessors.kt.after

@@ -0,0 +1,20 @@
+class Test {
+    var serial: String = ""
+        get
+        set
+    var name: String = ""
+        get
+
+    override fun equals(other: Any?): Boolean{
+        if (this === other) return true
+        if (other?.javaClass != javaClass) return false
+        return true
+    }
+
+    override fun hashCode(): Int{
+        return 0
+    }
+
+}
+
+// FORCED