[Ops][Triton] Add a triton kernel supporting partial rope. (#4413)

### What this PR does / why we need it?
This PR adds a triton rope kernel witch supports scenarios of `rope_dim
!= head_dim`. This can save the split op before rope and the concat op
after rope. Profiling shows improvement.

### Does this PR introduce _any_ user-facing change?
None
### How was this patch tested?
I will add related ut after ci integrated with triton.


- vLLM version: v0.11.2
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.2

---------

Signed-off-by: whx-sjtu <2952154980@qq.com>

vllm_ascend/ops/triton/triton_utils.py

@@ -0,0 +1,30 @@
+from typing import Any, Dict
+
+import torch
+from vllm.triton_utils import HAS_TRITON, triton
+
+_NUM_AICORE = -1
+_NUM_VECTORCORE = -1
+
+
+def init_device_properties_triton():
+    global _NUM_AICORE, _NUM_VECTORCORE
+    if _NUM_AICORE == -1 and HAS_TRITON:
+        device_properties: Dict[str, Any] = (
+            triton.runtime.driver.active.utils.get_device_properties(
+                torch.npu.current_device()))
+        _NUM_AICORE = device_properties.get("num_aicore", -1)
+        _NUM_VECTORCORE = device_properties.get("num_vectorcore", -1)
+        assert _NUM_AICORE > 0 and _NUM_VECTORCORE > 0, "Failed to detect device properties."
+
+
+def get_aicore_num():
+    global _NUM_AICORE
+    assert _NUM_AICORE > 0, "Device properties not initialized. Please call init_device_properties_triton() first."
+    return _NUM_AICORE
+
+
+def get_vectorcore_num():
+    global _NUM_VECTORCORE
+    assert _NUM_VECTORCORE > 0, "Device properties not initialized. Please call init_device_properties_triton() first."
+    return _NUM_VECTORCORE