fix: remove [dut-X] prefix from "line" and "file" attribute values in XML report

Author: alekseiapa

pytest-embedded-idf/pytest_embedded_idf/unity_tester.py

@@ -787,9 +787,9 @@ def get_merge_data(test_cases_attr: t.List[t.Dict]) -> t.Dict:
                     continue
 
                 if k not in output:
-                    output[k] = [f'[dut-{ind}]: {val}']
+                    output[k] = [val]
                 else:
-                    output[k].append(f'[dut-{ind}]: {val}')
+                    output[k].append(val)
 
         for k, val in output.items():
             if k in ('file', 'line'):