Make note that Subnet/SubnetSet for SubnetPorts are exclusive

[ihgann]

Elaborating on a comment from @bryanv .

ref:

nsx-operator/pkg/apis/v1alpha1/subnetport_types.go

Lines 11 to 16 in 8cdf0a2

	// SubnetPortSpec defines the desired state of SubnetPort.
	type SubnetPortSpec struct {
	// Subnet defines the parent Subnet name of the SubnetPort.
	Subnet string `json:"subnet,omitempty"`
	// SubnetSet defines the parent SubnetSet name of the SubnetPort.
	SubnetSet string `json:"subnetSet,omitempty"`

Can we make comments indicating that Subnet and SubnetSet are exclusive for a SubnetPortSpec? That if you choose "Subnet", then "SubnetSet" may not also be selected - and what the expected failure case would be here. Additionally - is the failure handled by a ValidatingWebhook, or will the SubnetPort resolve incorrectly (ValidatingWebhook might be better to reject outright).