[MoE] [Refactor] Combine common_fused_moe and fused_moe (#3176)

### What this PR does / why we need it?
1. Move additional functionalities from fused_moe.py to
common_fused_moe.py and remove fused_moe.py
2. Remove unnecessary custom classes from qwen3_moe.py, and it will be
completely removed after we release vllm-ascend v0.11.0

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

### How was this patch tested?

Qwen3-30B-A3B/Qwen3-30B-A3B-W8A8/DeepSeek-V3-W4A8-Pruing/deepseek-mtp/pangu-pro-moe-pruing:

1. Enable/Disable EP
3. Aclgraph & eager
4. SP


- vLLM version: v0.11.0

---------

Signed-off-by: Pr0Wh1teGivee <calvin_zhu0210@outlook.com>
Co-authored-by: weijinqian0 <12153182+weijinqian0@users.noreply.github.com>

vllm_ascend/ops/moe/moe_comm_method.py

@@ -67,12 +67,11 @@ class MoECommMethod(ABC):
                 hidden_states: torch.Tensor,
                 router_logits: torch.Tensor,
                 enable_shared_expert_dp: bool = False,
-                rm_router_logits: bool = False,
                 replace_allreduce: bool = False,
                 gate=None) -> tuple[torch.Tensor, torch.Tensor]:
         hidden_states, router_logits, mc2_mask = self.fused_moe_prepare_finalize.prepare(
             hidden_states, router_logits, enable_shared_expert_dp,
-            rm_router_logits, replace_allreduce, gate)
+            replace_allreduce, gate)
         self.mc2_mask = mc2_mask
         return hidden_states, router_logits