[Benches] Fix compare script failure (#21391)

The `name` field have been removed recently from the `Result` object.
Update `compare.py` to use the `label` field instead.

Ref. #21233

Author: PatKamin

devops/scripts/benchmarks/compare.py

@@ -154,10 +154,10 @@ def reset_aggregate() -> dict:
                     }
 
                 # Add every benchmark run to average_aggregate:
-                if test_run.name not in average_aggregate:
-                    average_aggregate[test_run.name] = reset_aggregate()
+                if test_run.label not in average_aggregate:
+                    average_aggregate[test_run.label] = reset_aggregate()
                 else:
-                    average_aggregate[test_run.name]["aggregate"].add(test_run.value)
+                    average_aggregate[test_run.label]["aggregate"].add(test_run.value)
 
         return {
             name: BenchmarkHistoricAverage(