fix tests

Signed-off-by: Jeev B <jeevb@users.noreply.github.com>

Author: jeevb

src/flyte/_internal/imagebuild/image_builder.py

@@ -142,7 +142,9 @@ class ImageBuildEngine:
     @staticmethod
     @alru_cache
     async def image_exists(image: Image) -> Optional[str]:
-        assert image.name is not None, f"Image name is not set for {image}"
+        if image.name is None:
+            logger.debug(f"Image {image} has no name. Skip existence check.")
+            return image.uri
 
         tag = image._final_tag