[Patch][Misc] Cleanup and update patches (#6802)

### What this PR does / why we need it?

This PR performs a cleanup and update of the patch mechanism in
`vllm-ascend`.

- Removes several obsolete patches: `patch_deepseek.py`.
- Updates the central patch documentation in
`vllm_ascend/patch/__init__.py` to reflect these removals and additions,
re-numbering and re-organizing the patch list for better clarity.

### Does this PR introduce _any_ user-facing change?

No. These are internal changes to the patching mechanism and should not
affect users.

### How was this patch tested?

CI passed with new added/existing test.

- vLLM version: v0.15.0
- vLLM main:
83b47f67b1

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

vllm_ascend/patch/worker/__init__.py

@@ -29,7 +29,6 @@ import vllm_ascend.patch.worker.patch_multimodal_merge  # noqa
 import vllm_ascend.patch.worker.patch_qwen3_next  # noqa
 import vllm_ascend.patch.worker.patch_qwen3_next_mtp  # noqa
 import vllm_ascend.patch.worker.patch_rejection_sampler  # noqa
-import vllm_ascend.patch.worker.patch_qwen3_next  # noqa
 import vllm_ascend.patch.worker.patch_v2_eagle  # noqa
 import vllm_ascend.patch.worker.patch_v2_uva  # noqa
 import vllm_ascend.patch.worker.patch_huanyuan_vl  # noqa