Clear service rate tab selection on shipment configuration change

Author: RafaelKayumov

WooCommerce/Classes/ViewRelated/Orders/Order Details/Shipping Labels/WooShipping Create Shipping Labels/ShipmentDetails/WooShippingShipmentDetailsViewModel.swift

@@ -392,6 +392,7 @@ private extension WooShippingShipmentDetailsViewModel {
             .dropFirst()
             .sink { [weak self] _ in
                 self?.selectedRate = nil
+                self?.shippingService?.clearSelectedRate()
             }
             .store(in: &subscriptions)
     }

WooCommerce/Classes/ViewRelated/Orders/Order Details/Shipping Labels/WooShipping Create Shipping Labels/WooShipping Package and Rate Selection/WooShippingServiceViewModel.swift

@@ -79,6 +79,11 @@ final class WooShippingServiceViewModel: ObservableObject {
         analytics.track(event: .WooShipping.rateSelectionStep(state: .selected))
     }
 
+    /// Clears the selected rate.
+    func clearSelectedRate() {
+        selectedRate = nil
+    }
+
     func refreshSelectedRate(from oldRate: WooShippingSelectedRate) -> WooShippingSelectedRate? {
         let updatedStandardRate = standardRates.first(where: {
             $0.serviceID == oldRate.rate.serviceID