[2/N][torch.compile] make compilation cfg part of vllm cfg (#10383)

Signed-off-by: youkaichao <youkaichao@gmail.com>

tests/compile/utils.py

@@ -4,7 +4,7 @@ import torch
 
 from tests.quantization.utils import is_quant_method_supported
 from vllm import LLM, SamplingParams
-from vllm.compilation.levels import CompilationLevel
+from vllm.config import CompilationLevel
 from vllm.platforms import current_platform
 
 TEST_MODELS = [