[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>

tests/e2e/singlecard/test_vlm.py

@@ -38,7 +38,7 @@ def test_multimodal_vl(prompt_template):
     ]
     images = [image] * len(img_questions)
     prompts = prompt_template(img_questions)
-    with VllmRunner("Qwen/Qwen2.5-VL-3B-Instruct",
+    with VllmRunner("Qwen/Qwen3-VL-8B-Instruct",
                     max_model_len=4096,
                     mm_processor_kwargs={
                         "min_pixels": 28 * 28,