Generate NGF Policy Methods

[kate-osborn]

As a developer
I want to be able to generate the methods shown below for all NGF Policy types
So that I don't have to duplicate boilerplate code every time I add a policy.

func (p *ClientSettingsPolicy) GetTargetRef() v1alpha2.PolicyTargetReference {
	return p.Spec.TargetRef
}

func (p *ClientSettingsPolicy) GetPolicyStatus() v1alpha2.PolicyStatus {
	return p.Status
}

func (p *ClientSettingsPolicy) SetPolicyStatus(status v1alpha2.PolicyStatus) {
	p.Status = status
}

Look into generating policy functions to determine if two policies conflict.