feat(checkout): update payment intent payload to use 'transfer_payer_dni' and remove placeholder from DNI input

src/app/features/store/pages/checkout-page/components/checkout-payment-transfer/checkout-payment-transfer.component.html

@@ -5,7 +5,6 @@
       <div class="col-8">
         <app-input
           type="text"
-          placeholder="99.999.999"
           [value]="dniControl.value"
           (valueChange)="dniControl.setValue($event.toString()); dniControl.markAsDirty()"
           [disabled]="isDniDisabled()"