Fix named split

rules/test.bzl

@@ -66,7 +66,7 @@ def _make_test_suite_splits(factory, name, **in_kwargs):
 
     Finally - you can set the splits to be whatever you want.
     """
-    split_name_to_kwargs = in_kwargs.get("split_name_to_kwargs", {})
+    split_name_to_kwargs = in_kwargs.pop("split_name_to_kwargs", {})
     splits = {}
     if split_name_to_kwargs and len(split_name_to_kwargs) > 0:
         for suffix, split_kwargs in split_name_to_kwargs.items():
@@ -174,6 +174,9 @@ def _ios_test(name, bundle_rule, test_rule, test_factory, apple_library, infopli
     else:
         ios_test_kwargs["runner"] = runner
 
+    if split_name_to_kwargs:
+        ios_test_kwargs["split_name_to_kwargs"] = split_name_to_kwargs
+
     # Deduplicate against the test deps
     if ios_test_kwargs.get("test_host", None):
         host_args = [ios_test_kwargs["test_host"]]