Add generate kwargs to AutomaticSpeechRecognitionPipeline (#20952)

* Add generate kwargs to AutomaticSpeechRecognitionPipeline

* Add test for generation kwargs

tests/pipelines/test_pipelines_automatic_speech_recognition.py

@@ -169,6 +169,17 @@ class AutomaticSpeechRecognitionPipelineTests(unittest.TestCase, metaclass=Pipel
         output = speech_recognizer(waveform)
         self.assertEqual(output, {"text": "あл ش 湯 清 ه ܬ া लᆨしث ल eか u w 全 u"})
 
+    @require_torch
+    def test_small_model_pt_seq2seq_gen_kwargs(self):
+        speech_recognizer = pipeline(
+            model="hf-internal-testing/tiny-random-speech-encoder-decoder",
+            framework="pt",
+        )
+
+        waveform = np.tile(np.arange(1000, dtype=np.float32), 34)
+        output = speech_recognizer(waveform, max_new_tokens=10, generate_kwargs={"num_beams": 2})
+        self.assertEqual(output, {"text": "あл † γ ت ב オ 束 泣 足"})
+
     @slow
     @require_torch
     @require_pyctcdecode