Only warn about longer taking passing tests compared to previous results

The previous approach could override a FAIL or even ERROR status to
WARN which is extremely misleading at best. This approach brings
the implementation closer to the originally desired functionality.

avocado_i2n/plugins/runner.py

@@ -263,7 +263,10 @@ async def run_test_node(self, node: TestNode, status_timeout: int = 10) -> bool:
                     logging.info(
                         f"Validating test duration {duration} is within usual bounds ({max_allowed})"
                     )
-                    if float(duration) > 1.25 * max_allowed:
+                    if (
+                        test_result["status"] == "PASS"
+                        and float(duration) > 1.25 * max_allowed
+                    ):
                         logging.warning(
                             f"Test result {uid} was obtained but test took much longer ({duration}) than usual"
                         )