fix: i18n azure llm mode

Author: liuruibin

apps/setting/models_provider/impl/aws_bedrock_model_provider/credential/llm.py

@@ -49,7 +49,7 @@ def is_valid(self, model_type: str, model_name, model_credential: Dict[str, obje
 
         try:
             model = provider.get_model(model_type, model_name, model_credential, **model_params)
-            model.invoke([HumanMessage(content=_('Hello'))])
+            model.invoke([HumanMessage(content=gettext('Hello'))])
         except AppApiException:
             raise
         except Exception as e:

apps/setting/models_provider/impl/azure_model_provider/credential/llm.py

@@ -53,7 +53,7 @@ def is_valid(self, model_type: str, model_name, model_credential: Dict[str, obje
                     return False
         try:
             model = provider.get_model(model_type, model_name, model_credential, **model_params)
-            model.invoke([HumanMessage(content=_('Hello'))])
+            model.invoke([HumanMessage(content=gettext('Hello'))])
         except Exception as e:
             if isinstance(e, AppApiException):
                 raise e