Enable PLC1802 on ruff (#165813)

Summary:
This PR enables ruff check `PLC1802`, which detects len calls on sequences in a boolean test context.

X-link: pytorch/pytorch#165813
Approved by: https://github.com/ezyang

Reviewed By: clee2000

Differential Revision: D84996241

fbshipit-source-id: 30f37fe70763bf55b699231f64d515c5352a25e8

Author: generatedunixname499836121

userbenchmark/dynamo/dynamobench/huggingface.py

@@ -124,7 +124,7 @@ def process_hf_reformer_output(out):
             continue
         batch_size = int(batch_size)
         BATCH_SIZE_KNOWN_MODELS[model_name] = batch_size
-assert len(BATCH_SIZE_KNOWN_MODELS)
+assert BATCH_SIZE_KNOWN_MODELS
 
 
 try: