[BUG] Some logs are not honoring DD_LOG_LEVEL

[Romack]

I have set DD_LOG_LEVEL to WARN in one of our applications and INFO logs are still being emitted from the following modules:

pkg/serializer/serializer.go:507
pkg/util/cloudproviders/cloudproviders.go:67
comp/metadata/inventoryotel/inventoryotelimpl/inventoryotel.go:214

At first glance, it looks like it may be an issue with the logger methods that accept a string format. e.g. log.Infof, log.Debugf.

Agent Environment

This is a Heroku application using heroku-buildpack-datadog
Datadog Agent 7.60.1-1

Describe what happened:
We set DD_LOG_LEVEL to WARN, but INFO level logs are still emitted

Describe what you expected:
Only logs with a level of WARN or above are emitted (WARN, ERROR, CRITICAL)

Steps to reproduce the issue:
Set DD_LOG_LEVEL to WARN and start up the application. You will still see some INFO level logs emitted

Additional environment details (Operating System, Cloud provider, etc):