[PyTorch] Avoid extra std::vector in parseSchemaOrName (#64678)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64678
We know we only want one declaration, so let's not create an excess std::vector (and thus a heap allocation) for that.
ghstack-source-id: 138036978
Test Plan: CI
Reviewed By: dhruvbird, tugsbayasgalan
Differential Revision: D30813785
fbshipit-source-id: c67e0100cdef5d894282939fb6d39a57309bc240
