[CI] Enable linux-aarch64-a2 (64GB) and tp2 * 2 max-parallel to speed up CI (#2065)

### What this PR does / why we need it?
Currently our workflow run time takes about 3 hours in total, which
seriously affects the developer experience, so it is urgent to have a
optimization, after this pr, It is expected that the running time of the
full CI can be shortened to 1h40min.

- Enable linux-aarch64-a2 (64GB) to replace linux-arm64-npu (32GB)
- Change TP4 ---> TP2 * 2 max-parallel
- Move DeepSeek-V2-Lite-W8A8 to single card test

### Does this PR introduce _any_ user-facing change?
No


- vLLM version: v0.10.0
- vLLM main:
a2480251ec

---------

Signed-off-by: wangli <wangli858794774@gmail.com>

tests/e2e/multicard/test_fused_moe_allgather_ep.py

@@ -46,7 +46,7 @@ def test_generate_with_allgather():
     sampling_params = SamplingParams(max_tokens=100, temperature=0.0)
 
     with VllmRunner(snapshot_download("vllm-ascend/DeepSeek-V3-Pruning"),
-                    tensor_parallel_size=4,
+                    tensor_parallel_size=2,
                     enforce_eager=True,
                     max_model_len=1024,
                     dtype="auto",
@@ -74,7 +74,7 @@ def test_generate_with_alltoall():
     sampling_params = SamplingParams(max_tokens=100, temperature=0.0)
 
     with VllmRunner(snapshot_download("vllm-ascend/DeepSeek-V3-Pruning"),
-                    tensor_parallel_size=4,
+                    tensor_parallel_size=2,
                     enforce_eager=True,
                     max_model_len=1024,
                     dtype="auto",