[CI]refactor: standardize test case naming convention (#5243)

### What this PR does / why we need it?
- Standardize test case naming in `vllm-ascend/tests/e2e/multicard/` to
follow the `<model>_<feature>_<distributed>` convention.

- vLLM version: release/v0.13.0
- vLLM main:
ad32e3e19c

---------

Signed-off-by: MrZ20 <2609716663@qq.com>
Signed-off-by: root <root@LAPTOP-VQKDDVMG.localdomain>
Co-authored-by: root <root@LAPTOP-VQKDDVMG.localdomain>

tests/e2e/multicard/test_fused_moe_allgather_ep.py

@@ -41,7 +41,7 @@ from tests.e2e.conftest import VllmRunner
         "TASK_QUEUE_ENABLE": "1",
         "VLLM_ENABLE_FUSED_EXPERTS_ALLGATHER_EP": "1"
     })
-def test_deepseek_moe_fused_allgather_ep():
+def test_deepseek_v3_moe_fused_allgather_ep_tp2():
     example_prompts = ["Hello, my name is"]
     sampling_params = SamplingParams(max_tokens=100, temperature=0.0)
 
@@ -62,7 +62,7 @@ def test_deepseek_moe_fused_allgather_ep():
     "VLLM_WORKER_MULTIPROC_METHOD": "spawn",
     "TASK_QUEUE_ENABLE": "1"
 })
-def test_deepseek_moe_fused_alltoall_ep():
+def test_deepseek_v3_moe_fused_alltoall_ep_tp2():
     example_prompts = ["Hello, my name is"]
     sampling_params = SamplingParams(max_tokens=100, temperature=0.0)