Fix data class equals codegen for type parameters with interface bounds

#KT-24474 Fixed

compiler/testData/codegen/box/dataClasses/equals/typeParameterWithInterfaceBound.kt

@@ -0,0 +1,9 @@
+interface A
+
+data class B<out T : A>(val a: T)
+
+fun box(): String {
+    val b1 = B(object : A {})
+    val b2 = B(object : A {})
+    return if (b1.equals(b2)) "Fail" else "OK"
+}