fix(flexible_ip): change ip_address type from IP to IPNet (#1410)

Co-authored-by: Jules Castéran <[email protected]>

Author: scaleway-bot

api/flexibleip/v1alpha1/flexibleip_sdk.go

@@ -245,7 +245,7 @@ type FlexibleIP struct {
 	// Default value: unknown
 	Status FlexibleIPStatus `json:"status"`
 	// IPAddress: IP of the Flexible IP
-	IPAddress net.IP `json:"ip_address"`
+	IPAddress scw.IPNet `json:"ip_address"`
 	// MacAddress: mAC address of the Flexible IP
 	MacAddress *MACAddress `json:"mac_address"`
 	// ServerID: ID of the server linked to the Flexible IP