Context

• Add a new optional boolean field "pattern-ingester" to the LokiStackSpec type to allow enabling/disabling the Loki pattern-ingester feature.
• Update the LokiStack reconciliation logic to check for spec.patternIngester, to subsequently create a new patternIngester component.

Acceptance Criteria

• New field "patternIngester" added to the LokiStackSpec
• A new Deployment is created if spec.patternIngester is true
• The "Patterns" tab should show up in the Logs Drilldown app
• Cleanup after disabling spec.patternIngester