[Backend Tester] Reduce log verbosity / spam

backends/test/harness/stages/serialize.py

@@ -13,6 +13,7 @@
 try:
     from executorch.extension.pybindings.portable_lib import (  # @manual
         _load_for_executorch_from_buffer,
+        Verification,
     )
 except ImportError as e:
     logger.warning(f"{e=}")
@@ -39,7 +40,9 @@ def graph_module(self) -> None:
 
     def run_artifact(self, inputs):
         inputs_flattened, _ = tree_flatten(inputs)
-        executorch_module = _load_for_executorch_from_buffer(self.buffer)
+        executorch_module = _load_for_executorch_from_buffer(
+            self.buffer, program_verification=Verification.Minimal
+        )
         executorch_output = copy.deepcopy(
             executorch_module.run_method("forward", tuple(inputs_flattened))
         )

backends/test/suite/runner.py

@@ -3,6 +3,7 @@
 import re
 import time
 import unittest
+import warnings
 
 from datetime import timedelta
 from typing import Any
@@ -249,6 +250,10 @@ def build_test_filter(args: argparse.Namespace) -> TestFilter:
 def runner_main():
     args = parse_args()
 
+    # Suppress deprecation warnings for export_for_training, as it generates a
+    # lot of log spam. We don't really need the warning here.
+    warnings.simplefilter("ignore", category=FutureWarning)
+
     begin_test_session(args.report)
 
     if len(args.suite) > 1: