Fixed KT-4431 Override/implement val: generate getter instead of initializer

#KT-4431 Fixed

idea/testData/codeInsight/overrideImplement/inheritVisibilities.kt.after

@@ -23,17 +23,23 @@ class C : A(), B {
         super<A>.internalFun()
     }
 
-    override val internalProperty: Int = 0
+    override val internalProperty: Int
+        get() = 0
+
     override fun protectedFun() {
         super<A>.protectedFun()
     }
 
-    override val protectedProperty: Int = 0
+    override val protectedProperty: Int
+        get() = 0
+
     override fun publicFun() {
         super<A>.publicFun()
     }
 
-    override val publicProperty: Int = 0
+    override val publicProperty: Int
+        get() = 0
+
     override fun toString(): String {
         return super<A>.toString()
     }