[Bugfix] [MoE] fix error in deepseek when using allgather (#3824)

### What this PR does / why we need it?
After refactoring vllm_ascend/models and FusedMoE, we are unable to pass
`gate` from deepseekv2.py to `AscendFusedMoE.forward`, which will result
in error when running deepseek v3/r1 with allgather.
Hence, this pr removes `gate` related computations from FusedMoE module
in eager/aclgraph mode.
### Does this PR introduce _any_ user-facing change?
`rm_router_logits` is deprecated in eager/aclgraph.
### How was this patch tested?
e2e & ut

- vLLM version: v0.11.0rc3
- vLLM main:
https://github.com/vllm-project/vllm/commit/releases/v0.11.1

Signed-off-by: Pr0Wh1teGivee <calvin_zhu0210@outlook.com>

vllm_ascend/torchair/ops/torchair_fused_moe.py

@@ -48,12 +48,12 @@ from vllm_ascend.eplb.core.eplb_utils import (determine_default_expert_map,
 from vllm_ascend.ops.expert_load_balancer import ExpertLoadBalancer
 from vllm_ascend.quantization.quant_config import AscendFusedMoEMethod
 from vllm_ascend.torchair.ops.sequence_parallel import MetadataForPadding
-from vllm_ascend.torchair.utils import (npu_stream_switch, npu_wait_tensor,
+from vllm_ascend.torchair.utils import (get_all_reduce_merge_state,
+                                        get_rm_router_logits_state,
+                                        npu_stream_switch, npu_wait_tensor,
                                         super_kernel)
 from vllm_ascend.utils import (AscendSocVersion, dispose_tensor,
-                               get_all_reduce_merge_state,
-                               get_ascend_soc_version,
-                               get_rm_router_logits_state, is_310p,
+                               get_ascend_soc_version, is_310p,
                                is_hierarchical_communication_enabled,
                                vllm_version_is)