[Tests] Test for passing local config file to `from_single_file()` (#6638)

make config file local too.

tests/pipelines/stable_diffusion/test_stable_diffusion.py

@@ -1246,9 +1246,12 @@ class StableDiffusionPipelineCkptTests(unittest.TestCase):
         assert image_out.shape == (512, 512, 3)
 
     def test_download_local(self):
-        filename = hf_hub_download("runwayml/stable-diffusion-v1-5", filename="v1-5-pruned-emaonly.ckpt")
+        ckpt_filename = hf_hub_download("runwayml/stable-diffusion-v1-5", filename="v1-5-pruned-emaonly.ckpt")
+        config_filename = hf_hub_download("runwayml/stable-diffusion-v1-5", filename="v1-inference.yaml")
 
-        pipe = StableDiffusionPipeline.from_single_file(filename, torch_dtype=torch.float16)
+        pipe = StableDiffusionPipeline.from_single_file(
+            ckpt_filename, config_files={"v1": config_filename}, torch_dtype=torch.float16
+        )
         pipe.scheduler = DDIMScheduler.from_config(pipe.scheduler.config)
         pipe.to("cuda")