loki.rules.kubernetes: Add support for clustered mode #978
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PR Description
This change adds support for updating Loki rules based on PrometheusRule objects when running in clustered mode. It does this by picking a single instance to be the leader responsible for making changes using the Loki API. Other non-leader instances will not process events or make calls to the Loki API.
Which issue(s) this PR fixes
Fixes #976
Notes to the Reviewer
PR Checklist