async tracing fix for cases when spantype is not set (Azure#38522)

Co-authored-by: Marko Hietala <[email protected]>

Author: M-Hietala

sdk/ai/azure-ai-inference/azure/ai/inference/tracing.py

@@ -640,7 +640,7 @@ def _trace_async_function(
         async def inner(*args, **kwargs):
             span_impl_type = settings.tracing_implementation()
             if span_impl_type is None:
-                return function(*args, **kwargs)
+                return await function(*args, **kwargs)
 
             class_function_name = function.__qualname__