[E2E] Refactor the e2e testcases. (#4789)

### What this PR does / why we need it?
Refactor the e2e testcases.
- tests/e2e/multicard/test_weight_loader.py: Remove the unused code.
- tests/e2e/singlecard/multi-modal/test_internvl.py: Move to accuracy
test.
- tests/e2e/singlecard/test_aclgraph.py: Rename the file.
- tests/e2e/singlecard/test_embedding_aclgraph.py : Combine with
tests/e2e/singlecard/test_bge_model.py
- tests/e2e/singlecard/test_completion_with_prompt_embeds.py: Delete
eager mode and modify model to Qwen3-0.6B
- tests/e2e/singlecard/test_quantization.py: Modify model to
Qwen3-0.6B-W8A8
- tests/e2e/singlecard/test_vlm.py: Modify model to Qwen3-VL-8B

- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c

---------

Signed-off-by: menogrey <1299267905@qq.com>

docs/source/locale/zh_CN/LC_MESSAGES/developer_guide/contribution/testing.po

@@ -169,11 +169,11 @@ msgstr ""
 #: ../../developer_guide/contribution/testing.md:246
 msgid ""
 "Correctness test example: "
-"[`tests/e2e/singlecard/test_aclgraph.py`](https://github.com/vllm-"
-"project/vllm-ascend/blob/main/tests/e2e/singlecard/test_aclgraph.py)"
+"[`tests/e2e/singlecard/test_aclgraph_accuracy.py`](https://github.com/vllm-"
+"project/vllm-ascend/blob/main/tests/e2e/singlecard/test_aclgraph_accuracy.py)"
 msgstr ""
-"正确性测试示例：[`tests/e2e/singlecard/test_aclgraph.py`](https://github.com/vllm-"
-"project/vllm-ascend/blob/main/tests/e2e/singlecard/test_aclgraph.py)"
+"正确性测试示例：[`tests/e2e/singlecard/test_aclgraph_accuracy.py`](https://github.com/vllm-"
+"project/vllm-ascend/blob/main/tests/e2e/singlecard/test_aclgraph_accuracy.py)"
 
 #: ../../developer_guide/contribution/testing.md:247
 msgid ""