【main】patch sched_yield (#3648)

### What this PR does / why we need it?
On Arm systems, os.sched_yield() does not take effect, causing the GIL
(Global Interpreter Lock) to remain unrelinquished and resulting in CPU
bound issues. This PR applies a patch to sched_yield in vLLM, making the
process execute time.sleep(0) instead to release the GIL.
### Does this PR introduce _any_ user-facing change?

### How was this patch tested?


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

---------

Signed-off-by: fems14 <1804143737@qq.com>

vllm_ascend/patch/worker/__init__.py

@@ -21,6 +21,7 @@ if HAS_TRITON:
     import vllm_ascend.patch.worker.patch_triton
 
 # isort: off
+import vllm_ascend.patch.platform.patch_sched_yield  # noqa
 import vllm_ascend.patch.worker.patch_distributed  # noqa
 import vllm_ascend.patch.worker.patch_logits  # noqa
 import vllm_ascend.patch.worker.patch_roberta  # noqa