chore: migrate to new CAPI contract

[cwrau]

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[Copilot]

Pull Request Overview

This PR migrates the codebase to use the new Cluster API (CAPI) contract by updating the status structure for hosted control planes. The changes align with CAPI v1beta2 requirements for control plane providers.

• Replaced direct Initialized boolean field with nested Initialization.ControlPlaneInitialized pointer field
• Added UpToDateReplicas status field to match CAPI contract requirements
• Updated test assertions and kubebuilder annotations to reflect new status structure

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
api/v1alpha1/hostedcontrolplane_types.go	Updated HostedControlPlaneStatus to use nested Initialization struct with pointer field instead of direct boolean; added UpToDateReplicas field
api/v1alpha1/zz_generated.deepcopy.go	Auto-generated deepcopy methods for new HostedControlPlaneInitializationStatus type
pkg/reconcilers/workload/reconciler.go	Updated code to set Initialization.ControlPlaneInitialized using ptr.To(true)
pkg/reconcilers/apiserverresources/apiserverresources.go	Added assignment of UpToDateReplicas from deployment status
pkg/hostedcontrolplane/lifecycle_phases_test.go	Updated test assertion to check nested Initialization.ControlPlaneInitialized pointer field

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