[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>

.github/workflows/_e2e_test.yaml

@@ -75,7 +75,7 @@ jobs:
           PYTORCH_NPU_ALLOC_CONF: max_split_size_mb:256
         if: ${{ inputs.type == 'light' }}
         run: |
-          # pytest -sv tests/e2e/singlecard/test_aclgraph.py
+          # pytest -sv tests/e2e/singlecard/test_aclgraph_accuracy.py
           # pytest -sv tests/e2e/singlecard/test_quantization.py
           pytest -sv tests/e2e/singlecard/test_vlm.py::test_multimodal_vl
           pytest -sv tests/e2e/singlecard/pooling/test_classification.py::test_classify_correctness
@@ -91,10 +91,9 @@ jobs:
           # the test separately.
 
           pytest -sv tests/e2e/singlecard/test_completion_with_prompt_embeds.py
-          pytest -sv tests/e2e/singlecard/test_aclgraph.py
+          pytest -sv tests/e2e/singlecard/test_aclgraph_accuracy.py
           pytest -sv tests/e2e/singlecard/test_aclgraph_mem.py
           pytest -sv tests/e2e/singlecard/test_camem.py
-          # pytest -sv tests/e2e/singlecard/test_embedding_aclgraph.py
           pytest -sv tests/e2e/singlecard/test_guided_decoding.py
           # torch 2.8 doesn't work with lora, fix me
           #pytest -sv tests/e2e/singlecard/test_ilama_lora.py
@@ -102,7 +101,6 @@ jobs:
           pytest -sv tests/e2e/singlecard/test_quantization.py
           pytest -sv tests/e2e/singlecard/test_sampler.py
           pytest -sv tests/e2e/singlecard/test_vlm.py
-          pytest -sv tests/e2e/singlecard/multi-modal/test_internvl.py
           pytest -sv tests/e2e/singlecard/test_xlite.py
           pytest -sv tests/e2e/singlecard/pooling/