[CI] Reorganize the L1 L2 use cases and add markers (#2449)

Signed-off-by: zhumingjue <zhumingjue@huawei.com>

tests/diffusion/quantization/test_fp8_config.py

@@ -5,7 +5,7 @@
 import pytest
 from torch import nn
 
-pytestmark = [pytest.mark.core_model, pytest.mark.diffusion]
+pytestmark = [pytest.mark.core_model, pytest.mark.diffusion, pytest.mark.cpu]
 
 
 def test_build_quant_config_fp8():