test-xml: migrate to new assertion macros (#37990)

We recently added a new set of assertion macros such as ASSERT_GE,
ASSERT_OK, ASSERT_EQ, ... which show not only the expression that failed
but also the values of the arguments of the expression. Let's use them.

src/test/test-xml.c

@@ -16,12 +16,12 @@ static void test_one(const char *data, ...) {
                 const char *nn;
 
                 t = xml_tokenize(&data, &name, &state, NULL);
-                assert_se(t >= 0);
+                ASSERT_GE(t, 0);
 
                 tt = va_arg(ap, int);
-                assert_se(tt >= 0);
+                ASSERT_GE(tt, 0);
 
-                assert_se(t == tt);
+                ASSERT_EQ(t, tt);
                 if (t == XML_END)
                         break;