cgen: fix gen_array_equality_fn() (#7633)

vlib/builtin/array_eq_test.v

@@ -0,0 +1,12 @@
+struct User {
+	age  int
+	name string
+}
+
+fn test_eq() {
+	assert [5, 6, 7] != [6, 7]
+	assert [`a`, `b`] == [`a`, `b`]
+	assert [User{age: 22, name: 'bob'}] == [User{age: 22, name: 'bob'}]
+	assert [{'bob': 22}, {'tom': 33}] == [{'bob': 22}, {'tom': 33}]
+	assert [[1, 2, 3], [4]] == [[1, 2, 3], [4]]
+}