Add Blip and Blip2 for pipeline tests (#21904)

* fix

* add to tests

* style and quality

* add missing

---------

Co-authored-by: NielsRogge <NielsRogge@users.noreply.github.com>
Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

tests/models/blip/test_modeling_blip.py

@@ -394,7 +394,11 @@ class BlipModelTester:
 @require_torch
 class BlipModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.TestCase):
     all_model_classes = (BlipModel,) if is_torch_available() else ()
-    pipeline_model_mapping = {"feature-extraction": BlipModel} if is_torch_available() else {}
+    pipeline_model_mapping = (
+        {"feature-extraction": BlipModel, "image-to-text": BlipForConditionalGeneration}
+        if is_torch_available()
+        else {}
+    )
     fx_compatible = False
     test_head_masking = False
     test_pruning = False