[Feat] support cache-dit for DreamID-Omni (#3265)

Signed-off-by: hanzheli <hanzheli@kuaishou.com>
Signed-off-by: fywc <hanzheli@kuaishou.com>

tests/diffusion/cache/test_cache_dit.py

@@ -15,6 +15,7 @@ from vllm_omni.diffusion.data import DiffusionCacheConfig
 pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
 
 SEPARATE_CFG_ENABLERS = [
+    cd_backend.enable_cache_for_dreamid_omni,
     cd_backend.enable_cache_for_ltx2,
     cd_backend.enable_cache_for_helios,
     cd_backend.enable_cache_for_wan22,