[hnswlib] Use darwin for stubtest (#16125)

Stubtest crashes on Linux, cf. #16100

Author: srittau

stubs/hnswlib/METADATA.toml

@@ -2,3 +2,8 @@ version = "0.8.*"
 upstream-repository = "https://github.com/nmslib/hnswlib"
 # Requires a version of numpy with a `py.typed` file
 dependencies = ["numpy>=1.21"]
+
+[tool.stubtest]
+# TODO: stubtest fails on Linux because it gets killed with a SIGILL
+# for unknown reasons. See https://github.com/python/typeshed/issues/16100
+ci-platforms = ["darwin"]