[BE]: Apply FURB118 (prev): replaces unnecessary lambdas with operator. (#116027)

This replaces a bunch of unnecessary lambdas with the operator package. This is semantically equivalent, but the operator package is faster, and arguably more readable. When the FURB rules are taken out of preview, I will enable it as a ruff check.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/116027
Approved by: https://github.com/malfet

benchmarks/distributed/rpc/rl/agent.py

@@ -1,3 +1,4 @@
+import operator
 import threading
 import time
 from functools import reduce
@@ -75,9 +76,7 @@ class AgentBase:
             batch (bool): Whether to process and respond to observer requests as a batch or 1 at a time
         """
         self.batch = batch
-        self.policy = Policy(
-            reduce((lambda x, y: x * y), state_size), nlayers, out_features
-        )
+        self.policy = Policy(reduce(operator.mul, state_size), nlayers, out_features)
         self.optimizer = optim.Adam(self.policy.parameters(), lr=1e-2)
 
         self.batch_size = batch_size