fix(core): move canonical_str

Author: bytestarter

volcenginesdkcore/interceptor/interceptors/common_request.py

@@ -126,10 +126,6 @@ def prepare_post_parameters(post_params=None, files=None):
     return params
 
 
-def model_sanitize_str(obj):
-    return sanitize_for_serialization(obj)
-
-
 def sanitize_for_serialization(obj):
     """Builds a JSON POST object.
 

volcenginesdkcore/model.py

@@ -0,0 +1,5 @@
+from volcenginesdkcore.interceptor import sanitize_for_serialization
+
+
+def canonical_str(obj):
+    return sanitize_for_serialization(obj)