Fix ClapProcessor to merge feature_extractor output into the returned BatchEncoding (#31767)

* fixed ClapProcessor to merge all values output from the feature extractor into the returned BatchEncoding.

* fixed trailing whitespace

src/transformers/models/clap/processing_clap.py

@@ -89,7 +89,7 @@ class ClapProcessor(ProcessorMixin):
             )
 
         if text is not None and audios is not None:
-            encoding["input_features"] = audio_features.input_features
+            encoding.update(audio_features)
             return encoding
         elif text is not None:
             return encoding