Standardize warnings with WARNING ⚠️ ... (#9467)

* Standardize warnings

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

benchmarks.py

@@ -91,7 +91,7 @@ def run(
         except Exception as e:
             if hard_fail:
                 assert type(e) is AssertionError, f'Benchmark --hard-fail for {name}: {e}'
-            LOGGER.warning(f'WARNING: Benchmark failure for {name}: {e}')
+            LOGGER.warning(f'WARNING ⚠️ Benchmark failure for {name}: {e}')
             y.append([name, None, None, None])  # mAP, t_inference
         if pt_only and i == 0:
             break  # break after PyTorch