[CustomOp] Register RotaryEmbedding instead of overwrite forward (#2385)

### What this PR does / why we need it?
Register RotaryEmbedding instead of overwrite forward

### Does this PR introduce _any_ user-facing change?
N/A

### How was this patch tested?
CI passed with new added/existing test.

- vLLM version: v0.10.0
- vLLM main:
808d2e9aa0

---------

Signed-off-by: Icey <1790571317@qq.com>
Signed-off-by: wxsIcey <1790571317@qq.com>

vllm_ascend/ops/__init__.py

@@ -17,12 +17,13 @@
 
 import torch
 
-import vllm_ascend.ops.activation  # noqa
 import vllm_ascend.ops.common_fused_moe  # noqa
 import vllm_ascend.ops.fused_moe  # noqa
 import vllm_ascend.ops.layernorm  # noqa
-import vllm_ascend.ops.rotary_embedding  # noqa
 import vllm_ascend.ops.vocab_parallel_embedding  # noqa
+from vllm_ascend.ops.activation import AscendQuickGELU, AscendSiluAndMul
+from vllm_ascend.ops.rotary_embedding import (
+    AscendDeepseekScalingRotaryEmbedding, AscendRotaryEmbedding)
 
 
 class dummyFusionOp:
@@ -47,3 +48,9 @@ def register_dummy_fusion_op() -> None:
         name="fused_add_rms_norm_static_fp8_quant")
     torch.ops._C.rms_norm_dynamic_per_token_quant = dummyFusionOp(
         name="rms_norm_dynamic_per_token_quant")
+
+
+__all__ = [
+    "AscendQuickGELU", "AscendSiluAndMul", "AscendRotaryEmbedding",
+    "AscendDeepseekScalingRotaryEmbedding"
+]