[Model] Add LongCat-Video-Avatar-1.5 ai2v, at2v support (#4099)

Signed-off-by: weiyan <weiyanlin117@gmail.com>
Signed-off-by: Didan Deng <33117903+wtomin@users.noreply.github.com>
Co-authored-by: Didan Deng <33117903+wtomin@users.noreply.github.com>
Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>

tests/model_tests/diffusion/test_alignment.py

@@ -40,6 +40,7 @@ EXCLUDED_MODELS = [
     "WanT2VDMD2Pipeline",
     "WanI2VDMD2Pipeline",
     "LongCatImagePipeline",
+    "LongCatVideoAvatarPipeline",
     "BagelPipeline",
     "BooguImagePipeline",
     "LancePipeline",