Support JobFlowTemplate CRD

[dongjiang1989]

What is the problem you're trying to solve

JobFlowTemplate supports the pre-definition of numerous sets of job flows.
These jobFlows can be triggered by specific events, such as scheduled triggers or triggers based on changes in input data.

Describe the solution you'd like

Add JobFlowTemplate CRD

type JobFlowTemplate struct {
        metav1.TypeMeta   `json:",inline"`
        metav1.ObjectMeta `json:"metadata,omitempty"`

        Spec   v1alpha1.JobSpec  `json:"spec,omitempty"`

        TriggerList []Trigger `json:"trigger,omitempty"`  # Trigger event queue waiting for jobflow run

        Status JobTemplateStatus `json:"status,omitempty"`  # JobFlow DependsOn List
}

type JobFlowTemplateList struct {
        metav1.TypeMeta `json:",inline"`
        metav1.ListMeta `json:"metadata,omitempty"`
        Items           []JobFlowTemplate `json:"items"`
}

type JobFlowTemplateStatus struct {
        JobFlowDependsOnList []string `json:"jobFlowDependsOnList,omitempty"`
}

type JobFlowTemplateStatus struct {
        JobFlowDependsOnList []string `json:"jobFlowDependsOnList,omitempty"`
}

type Trigger struct {
        Name        string `json:"name,omitempty"`
        Condition   string `json:"condition,omitempty"`
        Description string `json:"description,omitempty"`
        Enabled     *bool  `json:"enabled,omitempty"`
}

Additional context

No response

[Monokaix]

cc @hwdef

[hwdef]

We need more scenes.

[hwdef]

If you want to contribute to the jobflow, I have some scenarios that can provide:

• refactor framework. Currently using controller-runtime, changing to informer would be better, agree with volcano's other controller comparisons.
• Implement other unimplemented but planned functions. https://github.com/volcano-sh/volcano/tree/master/docs/design/jobflow#jobflow-task-scheduling