[Spec](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/file-exporter.md) says we need to add a File Exporter for Logs. The spec for the file exporter says it's in "Dev" [status](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/file-exporter.md) so this issue is a placeholder for this work until it becomes stable. This is not required for Logs GA.