[AOTI] Skip emit_multi_arch_kernel when CUDA version is lower than 12.8

Summary: Fix #168353. aot_inductor.emit_multi_arch_kernel requires a newer CUDA version.

[ghstack-poisoned]

Author: desertfire

test/inductor/test_aot_inductor.py

@@ -250,8 +250,8 @@ def forward(self, x):
     # failure on CI
     @common_utils.parametrize("embed_kernel_binary", [False])
     @unittest.skipIf(
-        torch.version.hip is None and _get_torch_cuda_version() < (12, 6),
-        "Test is only supported on CUDA 12.6+",
+        torch.version.hip is None and _get_torch_cuda_version() < (12, 8),
+        "Test is only supported on CUDA 12.8+",
     )
     def test_simple_multi_arch(self, embed_kernel_binary):
         if self.device != GPU_TYPE:

test/inductor/test_aot_inductor_package.py

@@ -315,8 +315,8 @@ def forward(self, x, y):
                 self.assertTrue(torch.allclose(actual, expected))
 
     @unittest.skipIf(
-        torch.version.hip is None and _get_torch_cuda_version() < (12, 6),
-        "Test is only supported on CUDA 12.6+",
+        torch.version.hip is None and _get_torch_cuda_version() < (12, 8),
+        "Test is only supported on CUDA 12.8+",
     )
     @unittest.skipIf(IS_FBCODE, "cmake won't work in fbcode")
     @skipIfXpu  # doesn't support multi-arch binary