MINOR: api: add new CustomClientIP option to Edge deployment

This commit adds the new option `CustomClientIP` / `customClientIP` to
the CreateOrUpdateEdgeDeploymentServiceBody struct. This option prevents
the Fastly-Client-IP header from being overwritten by the NGWAF. It is
intended for advanced use cases.

api.go

@@ -2955,6 +2955,7 @@ func (sc *Client) DeleteEdgeDeployment(corpName, siteName string) error {
 type CreateOrUpdateEdgeDeploymentServiceBody struct {
 	ActivateVersion *bool `json:"activateVersion,omitempty"` // Activate Fastly VCL service after clone
 	PercentEnabled  int   `json:"percentEnabled,omitempty"`  // Percentage of traffic to send to NGWAF@Edge
+	CustomClientIP  *bool `json:"customClientIP,omitempty"`  // allow using a custom IP without overriding Fastly-Client-IP
 }
 
 // CreateOrUpdateEdgeDeploymentService copies the backends from the Fastly service to the