[Collective APIs] Make python object collective API args consistent (#50625)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/50625
Make API signatures consistent and provide default argument similar to
the tensor collectives.
ghstack-source-id: 120718121
Test Plan: CI
Reviewed By: wanchaol
Differential Revision: D25932012
fbshipit-source-id: d16267e236a65ac9d55e19e2178f9d9267b08a20
