test: Enable auto retries and disable manual retries on perf A/B test

We're observing spurious failures in the perf A/B pipeline. Some of them
are gone in retries. To reduce unnecessary manual effort, enables
automatic retries and disables manual retries on the pipeline.

Signed-off-by: Takahiro Itazuri <[email protected]>

Author: zulinx86

.buildkite/pipeline_perf.py

@@ -114,6 +114,10 @@ def build_group(test):
             {"exit_status": -1, "limit": 1},
         ]
     }
+    if REVISION_A:
+        # Enable automatic retry and disable manual retries to suppress spurious issues.
+        test_data["retry"]["automatic"].append({"exit_status": 1, "limit": 1})
+        test_data["retry"]["manual"] = False
     group_steps.append(build_group(test_data))
 
 pipeline = {