[CI] Update test markers and configurations to use 'full_model' for L4 nightly tests (#2641)

Signed-off-by: wangyu <410167048@qq.com>

tests/benchmarks/test_accuracy_bench_utils.py

@@ -6,6 +6,9 @@ from pathlib import Path
 import pytest
 from PIL import Image
 
+pytestmark = [pytest.mark.core_model, pytest.mark.diffusion, pytest.mark.cpu]
+
+
 REPO_ROOT = Path(__file__).resolve().parents[2]
 if str(REPO_ROOT) not in sys.path:
     sys.path.insert(0, str(REPO_ROOT))
@@ -37,8 +40,6 @@ from benchmarks.accuracy.text_to_image.gbench import (
     summarize_gebench_results,
 )
 
-pytestmark = [pytest.mark.core_model, pytest.mark.diffusion, pytest.mark.cpu]
-
 
 def test_summarize_gebench_generated_records_groups_by_type():
     records = [