bugfix: error metrics should be sent during exception handling

Signed-off-by: Joey Zhao <5253430+joeyzhao2018@users.noreply.github.com>

Author: joeyzhao2018

datadog_lambda/wrapper.py

@@ -165,10 +165,9 @@ def __call__(self, event, context, **kwargs):
             self.response = self.func(event, context, **kwargs)
             return self.response
         except Exception:
-            if not should_use_extension:
-                from datadog_lambda.metric import submit_errors_metric
+            from datadog_lambda.metric import submit_errors_metric
 
-                submit_errors_metric(context)
+            submit_errors_metric(context)
 
             if self.span:
                 self.span.set_traceback()