This change adds a NetBird server to the e2e test and ensures that
cluster proxy peers can start and connect to the server.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Changes**
* Updated the `ClusterProxy` `spec.apiServer` default to include a
trailing `/` when omitted, aligning operator behavior with the
Kubernetes in-cluster API URL.
* **Documentation**
* Refreshed the `ClusterProxySpec.apiServer` API reference to reflect
the trailing `/` default.
* **Tests**
* Improved end-to-end coverage with a dynamically provisioned management
URL, more robust readiness polling, and enhanced `ClusterProxy`
validation.
* **Chores**
* Updated the end-to-end test Go configuration and CI to use the
e2e-specific Go settings/toolchain.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
This change adds an option to specify groups a cluster proxy peer is a
member of.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Added optional `spec.groups` to the ClusterProxy custom resource to
associate group references by `id`, `name`, or `localRef`.
* CRD schema includes OpenAPI validation to enforce that each group
reference specifies exactly one selector.
* **Bug Fixes**
* Improved deep-copy behavior for ClusterProxy spec so group references
are copied safely and don’t share underlying slices.
* **Documentation**
* Updated API reference docs and README API table to include the new
`groups` field.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
This change updates the api proxy version and configures a readiness
probe.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
## Release Notes
* **Improvements**
* Enhanced cluster proxy health monitoring with readiness checks.
* Increased cluster proxy replicas to 3 for improved availability and
resilience.
* Updated kubeapi-proxy to the latest version.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
If not set the apply will error if a resource has been manually edited.
This changes all apply calls to use force ownership.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
## Release Notes
* **Bug Fixes**
* Fixed resource ownership handling across multiple controllers to
ensure proper claim and management of Kubernetes resources during
deployment and reconciliation operations.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
The proxy container defaults `--management-url` to
`https://api.netbird.io`, so on self-hosted NetBird the proxy talks to
SaaS and rejects the setup key as invalid.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added support for configuring a management URL for the cluster proxy
service.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->