[Refactor] refactor patch module (#3555)

### What this PR does / why we need it?
we notice that `patch_main` is never used. Usually the patch is for all
version. And if it's for specified version, we can use `vllm_version_is`
instead. So let's remove the useless sub folder in patch module to make
it clear.


- vLLM version: v0.11.0rc3
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0

Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>

vllm_ascend/torchair/torchair_model_runner.py

@@ -390,7 +390,7 @@ class NPUTorchairModelRunner(NPUModelRunner):
         if is_310p():
             # on 300I Duo platform, we need to patch broadcast. however, this patch will be
             # overwritten by patch_for_hcom in torchair. so we need to re-patch it here.
-            from vllm_ascend.patch.platform.patch_common.patch_distributed import \
+            from vllm_ascend.patch.platform.patch_distributed import \
                 communication_adaptation_310p
             communication_adaptation_310p()