Update pipelines with pydantic

Signed-off-by: shiyu22 <shiyu.chen@zilliz.com>

image_embedding.py

@@ -1,19 +1,20 @@
+from typing import Optional
+from pydantic import BaseModel
 from towhee import pipe, ops, AutoPipes, AutoConfig
 
 
 @AutoConfig.register
-class ImageEmbeddingConfig:
-    def __init__(self):
-        # config for audio_decode.ffmpeg
-        self.mode = 'BGR'
-        
-        # config for audio_embedding.vggish
-        self.model_name = 'resnet50'
-        self.num_classes: int = 1000
-        self.skip_preprocess: bool = False
-        
-        # config for triton
-        self.device = -1
+class ImageEmbeddingConfig(BaseModel):
+    # config for image_decode
+    mode: Optional[str] = 'BGR'
+    
+    # config for image_embedding
+    model_name: Optional[str] = 'resnet50'
+    num_classes: Optional[int] = 1000
+    skip_preprocess: Optional[bool] = False
+    
+    # config for triton
+    device: Optional[int] = -1
 
 
 @AutoPipes.register