Docs: Add additional step/check to the Loki HELM Migration Guide for checking Schema Config · grafana/loki#9394

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help wantedtype/docs

Description

For the Loki HELM Migration Guide it would be beneficial to add an additional step/check into this, for the user to verify the Schema Config has been set correctly in the new HELM Chart Config, and any old Schema Configs are migrated over correctly.

This helps when users have multiple schemas that were used before of different values to those specified in the loki HELM Chart. Items to check should include, a correct from date, store, schema and index prefix etc.

Link to Doc: https://grafana.com/docs/loki/latest/installation/helm/migrate-from-distributed/

Relevant Context: https://github.com/grafana/support-escalations/issues/5824

Contributor guide

Tech stack: go
Domain: documentation
Issue type: documentation
Difficulty: 2
Estimated time: 1-3 hours
Activity status: blocked
Clarity: clear
Prerequisites: HelmLokischema configuration
Newbie friendliness: 75
Research direction: Refer to the existing migration guide at https://grafana.com/docs/loki/latest/installation/helm/migrate from distributed/. Review the schema configuration section and identify where to add a step that instructs users to verify that their schema config is correctly set in the new Helm chart. Ensure the step covers checking 'from' date, store, schema, and index prefix. The related context in support escalations issue #5824 may provide additional details on common pitfalls.