Description of problem:

In order to be able to easily know in which stage the installation is, the ProgressInfo should be available in the Agent and AgentClusterInstall CRDs


For example for host:
type HostProgressInfo struct {
	CurrentStage models.HostStage `json:"currentStage,omitempty"`
	ProgressInfo string           `json:"progressInfo,omitempty"`
	// Name in REST API: stage_started_at
	StageStartTime string `json:"stageStartTime,omitempty"`
	// Name in REST API: stage_updated_at
	StageUpdateTime string `json:"stageUpdateTime,omitempty"`
}