pytorch/feature: Record if inductor fx cache is enabled (#141059)

Summary:
This uses the underlying infrastructure and records if the fx cache is
enabled.

X-link: pytorch/pytorch#141059
Approved by: https://github.com/masnesral

Reviewed By: izaitsevfb

Differential Revision: D66405260

Pulled By: c00w

fbshipit-source-id: c88823ec4fd752d90385ed1d55f49a3e47fc78b0

userbenchmark/dynamo/dynamobench/_dynamo/utils.py

@@ -3599,4 +3599,6 @@ def set_feature_use(feature: str, usage: bool):
     Records whether we are using a feature
     Generally a feature is a JK.
     """
-    get_metrics_context().set_key_value("feature_usage", feature, usage)
+    # Note that sometimes (tests etc...) we're not in a context which we can record into
+    if get_metrics_context().in_progress():
+        get_metrics_context().set_key_value("feature_usage", feature, usage)