Add hotaisle to TestListBackendTypes

Author: Bihan Rana

src/tests/_internal/server/routers/test_backends.py

@@ -83,6 +83,7 @@ async def test_returns_backend_types(self, client: AsyncClient):
             "cudo",
             "datacrunch",
             "gcp",
+            "hotaisle",
             "kubernetes",
             "lambda",
             *(["nebius"] if sys.version_info >= (3, 10) else []),