Proposed title of this feature request

Being able to enable pattern-ingester.enabled to integrate Grafana DrillDown with Loki

What is the nature and description of the request?

For integrating Grafana Logs DrillDown with Loki, it's needed as per Grafana Logs DrillDown documentation to enable:

• "pattern-ingester.enabled: true". This option is by default false and not exposed in the Loki Operator API to enable it
• "allow_structured_metadata: true". This option is enabled in Red Hat Loki when set the storage schema v13 (nothing to do)
• "volume_enabled: true". This option is enabled by default in Red Hat Loki, nothing to do.

Then, it's requested to be able to enable the option "pattern-ingester.enabled: true" to be able to integrate and use Grafana Logs DrillDown.

Why does the customer need this? (List the business requirements)

For a better observability of the logs using the integration of Grafana DrillDown with Red Hat Loki

List any affected packages or components.
Red Hat Loki

[Please describe]