Refactor the ops PyTorch adapter，cleanup for csrc/torch_binding.cpp (#6732)

### What this PR does / why we need it?
Refactor the ops PyTorch adapter，cleanup for csrc/torch_binding.cpp,
more details see
https://github.com/vllm-project/vllm-ascend/issues/6486

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

### How was this patch tested?
install the new package to test the new modification, here is the
result:


- vLLM version: v0.15.0
- vLLM main:
9562912cea

---------

Signed-off-by: liziyu <liziyu16@huawei.com>
Signed-off-by: wangxiaoteng <wangxiaoteng@huawei.com>
Signed-off-by: luomin2005 <luomin2005@huawei.com>
Co-authored-by: liziyu <56102866+liziyu179@users.noreply.github.com>
Co-authored-by: wangxiaoteng <wangxiaoteng@huawei.com>

csrc/apply_top_k_top_p_custom/apply_top_k_top_p_custom_torch_adpt.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) Huawei Technologies Co., Ltd. 2026. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef APPLY_TOP_K_TOP_P_CUSTOM_TORCH_ADPT_H
+#define APPLY_TOP_K_TOP_P_CUSTOM_TORCH_ADPT_H
+
+namespace vllm_ascend {
+at::Tensor npu_apply_top_k_top_p(
+    const at::Tensor& logits,
+    const c10::optional<at::Tensor>& p,
+    const c10::optional<at::Tensor>& k)
+{
+    TORCH_CHECK(p.has_value() || k.has_value(),
+                "apply_top_k_top_p: p and k cannot be None at the same time.");
+
+    at::Tensor out = at::empty_like(logits);
+
+    EXEC_NPU_CMD(
+        aclnnApplyTopKTopPCustom,
+        logits,
+        p,
+        k,
+        out);
+
+    return out;
+}    
+}
+#endif