<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Introduced new HelmRelease configurations for cert-manager, monitoring
agents, and Victoria Metrics Operator in Kubernetes.
- Added resource specifications for `vmselect` in the VMCluster
configuration.
- Enhanced resource management for `vmselect` with defined limits and
requests for memory and CPU.
- **Bug Fixes**
- Adjusted resource limits for Redis failover memory allocation.
- **Documentation**
- Updated README and release notes for various components, enhancing
clarity and usability.
- **Chores**
- Updated image versions across multiple components for consistency and
performance improvements.
- Modified migration scripts to facilitate transitions and manage
resources effectively.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Andrei Kvapil <kvapss@gmail.com>

- Remove grafana-oncall
- Add Alerta
- Configure basic alerts
- Update grafana 10 --> 11
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Added new configuration options for the Alerta service, enhancing user
customization.
- Introduced a new Helm chart for the VictoriaMetrics Kubernetes stack,
enabling comprehensive monitoring solutions.
- Added VMAuth feature for enhanced authentication in the Kubernetes
stack.
- **Bug Fixes**
- Fixed issues with the ETCD dashboard and improved ingress path prefix
handling.
- **Documentation**
- Updated README and release guide for the VictoriaMetrics stack with
installation and configuration instructions.
- Introduced a changelog for organized tracking of changes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Signed-off-by: Andrei Kvapil <kvapss@gmail.com>