Add test for DESurrogateHybrid autotuner

Add test_de_surrogate_hybrid following the same pattern as
test_differential_evolution_search. Uses small population (5)
and few generations (3) for quick verification.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: FranciscoThiesen

test/test_autotuner.py

@@ -31,6 +31,7 @@
 from helion._testing import import_path
 from helion._testing import skipIfCpu
 from helion._testing import skipIfRocm
+from helion.autotuner import DESurrogateHybrid
 from helion.autotuner import DifferentialEvolutionSearch
 from helion.autotuner import PatternSearch
 from helion.autotuner.base_search import BaseSearch
@@ -381,6 +382,21 @@ def test_differential_evolution_search(self):
         fn = bound_kernel.compile_config(best)
         torch.testing.assert_close(fn(*args), args[0] @ args[1], rtol=1e-2, atol=1e-1)
 
+    @skipIfRocm("too slow on rocm")
+    @skip("too slow")
+    def test_de_surrogate_hybrid(self):
+        args = (
+            torch.randn([512, 512], device=DEVICE),
+            torch.randn([512, 512], device=DEVICE),
+        )
+        bound_kernel = examples_matmul.bind(args)
+        random.seed(123)
+        best = DESurrogateHybrid(
+            bound_kernel, args, population_size=5, max_generations=3
+        ).autotune()
+        fn = bound_kernel.compile_config(best)
+        torch.testing.assert_close(fn(*args), args[0] @ args[1], rtol=1e-2, atol=1e-1)
+
     @skip("too slow")
     def test_pattern_search(self):
         args = (