Don't use Profiler key in lite interpreter (#37962)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37962
Temporarily re-enable RecordFunction in lite interpreter when profiler key is not set,
this allows the profiler to work without profiled wrappers in the build
Test Plan: CI
Reviewed By: smessmer, linbinyu
Differential Revision: D21409120
fbshipit-source-id: 6f0311c8eb55537a03b8bdac69def18a496ec672
