Refactor tensor_parallel and comm_utils (#2814)

### What this PR does / why we need it?
1. Move ops/comm_utils to ops/moe/comm_utils
2. Move distributed/tensor_parallel/gather_from_sequence_parallel_region
to ops/moe/comm_utils
3. Delete distributed/tensor_parallel

### Does this PR introduce _any_ user-facing change?
no

### How was this patch tested?
e2e & ut

- vLLM version: main
- vLLM main:
a1213fae5f

---------

Signed-off-by: wuweiqiang24 <1005334931@qq.com>
Signed-off-by: wuweiqiang24 <wuweiqiang11@huawei.com>

vllm_ascend/ops/moe/token_dispatcher.py

@@ -30,9 +30,8 @@ from vllm.distributed.parallel_state import get_ep_group
 
 import vllm_ascend.envs as envs_ascend
 from vllm_ascend.distributed.parallel_state import get_mc2_group
-from vllm_ascend.distributed.tensor_parallel import \
-    gather_from_sequence_parallel_region
-from vllm_ascend.ops.comm_utils import async_all_to_all
+from vllm_ascend.ops.moe.comm_utils import (
+    async_all_to_all, gather_from_sequence_parallel_region)
 from vllm_ascend.utils import AscendSocVersion, get_ascend_soc_version
 
 _Dispatchers: Dict[str, Any] = {}