Add all communication primitives (such as send recv alltoall) to communication module

[NOBLES5E]

Currently there are only broadcast and allreduce: https://bagua.readthedocs.io/en/latest/autoapi/bagua/torch_api/communication/index.html

• [x] We need a python test script to test all primitive operations have the same result as torch.distriubuted implementation

[create-issue-branch[bot]]

Branch issue-56-Add_all_communication_primitives_such_as_send_recv_to_communication_module created!