Add new API's is Submariner for OVN

[aswinsuryan]

As per the enhancement proposal and two new CRDs

type SubmarinerNonGWRouteList struct {
metav1.TypeMeta json:",inline"
metav1.ListMeta json:"metadata"

Items []SubmarinerNonGWRoute `json:"items"`

}

type SubmarinerRoutePolicySpec struct {
//Specifies the next hop to reach the remote CIDRs
NextHop string json:"nextHop"

//Specifies the remote CIDRs available via the next hop
RemoteCidr []string `json:"remoteCidr"`

}

type SubmarinerGwRouteList struct {
metav1.TypeMeta json:",inline"
metav1.ListMeta json:"metadata"

Items []SubmarinerGwRoute json:"items"
}

type SubmarinerRoutePolicySpec struct {
//Specifies the next hop to reach the remote CIDRs
NextHop string json:"nextHop"

//Specifies the remote CIDRs available via the next hop
RemoteCidr []string `json:"remoteCidr"`

}