loki-app release v0.12.3

Changed

• Remove custom giantswarm service for monitoring in favor of upstream servicemonitor
• Moved imagePullSecrets to multiTenantAuth.image.pullSecrets

Fixed

• Fix loki-backend sidecar pod security standard violations.

Changed

• Upgraded upstream chart from 5.23.0 to 5.26.0 - see changelog for more information.