Gate per-component ServiceMonitor/PodMonitor manifests behind --platform-monitoring (follow-up to #9527)

Follow-up to #9527 (HYPERFLEET-1557), which gated the control-plane-operator's own watches and its bootstrap PodMonitor behind --platform-monitoring flag.

However, other CPOv2 components still register their ServiceMonitor/PodMonitor manifest adapters unconditionally, e.g.:

• control-plane-operator/controllers/hostedcontrolplane/v2/kas/component.go
• control-plane-operator/controllers/hostedcontrolplane/v2/etcd/component.go
• control-plane-operator/controllers/hostedcontrolplane/v2/cvo/component.go
• control-plane-operator/controllers/hostedcontrolplane/v2/kcm/component.go
• control-plane-operator/controllers/hostedcontrolplane/v2/oapi/component.go
• control-plane-operator/controllers/hostedcontrolplane/v2/ignitionserver/component.go
• (and others across v2/*/component.go)

None of these pass component.WithPredicate(...) on their servicemonitor.yaml/podmonitor.yaml adapters. support/controlplane-component/generic-adapter.go only consults GVKAccessChecker inside the predicate-false branch, so components with no predicate skip that check entirely and call ApplyManifest directly.

On a management cluster without the monitoring.coreos.com CRDs, this means CPO reconciliation for these components fails with a NoKindMatchError, even with --platform-monitoring None set at install time.

Suggested fix: gate each of these manifest adapters with component.WithPredicate(...) tied to EnablePlatformMonitoring, following the pattern in control-plane-operator/controllers/hostedcontrolplane/v2/controlplaneoperator/component.go.

Start with support/controlplane-component/generic-adapter.go and the pattern in control-plane-operator/controllers/hostedcontrolplane/v2/controlplaneoperator/component.go. Review the listed v2/*/component.go files and identify ServiceMonitor and PodMonitor adapters that lack component.WithPredicate(...). Done means those adapters are gated by EnablePlatformMonitoring so reconciliation does not apply monitoring manifests when the flag is None.