[Refactor][CI] Reorganize test tree, and move slow e2e to weekly (#4951)

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

tests/entrypoints/test_pd_disaggregation.py

@@ -22,6 +22,9 @@ from vllm import SamplingParams
 
 from vllm_omni.entrypoints.pd_utils import PDDisaggregationMixin
 
+pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
+
+
 pytestmark = pytest.mark.skip(reason="Temporarily skip PD entrypoint tests while PD config is being removed.")
 
 # Suppress noisy DeprecationWarnings from optional Swig bindings imported by vLLM dependencies.