Resolve "Loki schema config change uses a date in the past"

General MR

Summary

Our default Loki log schemaConfigs contains a time in the past where now users may not be able to query logs.

https://grafana.com/docs/loki/latest/setup/upgrade/#structured-metadata-open-telemetry-schemas-and-indexes

Relevant logs/screenshots

N/A

Linked Issue

#156 (closed)

Upgrade Notices

Ensure that .Values.schemaConfig.configs v13 schema from date is at a point in time in the future.