Refine stubs generation for special built-ins

Do not generate stub if declaration has the same signature

 #KT-12909 Fixed

compiler/testData/codegen/box/specialBuiltins/redundantStubForSize.kt

@@ -0,0 +1,28 @@
+open class A1 {
+    open val size: Int = 56
+}
+
+class A2 : A1(), Collection<String> {
+    // No 'getSize()' method should be generated in A2
+
+    override fun contains(element: String): Boolean {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun containsAll(elements: Collection<String>): Boolean {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun isEmpty(): Boolean {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun iterator(): Iterator<String> {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+}
+
+fun box(): String {
+    if (A2().size != 56) return "fail 1"
+    return "OK"
+}