MM 43666 - request bussiness email (#20315)

* MM-43666 - request bussiness email

* add the newValidEmail information

* revert ff model changes

* remove unnecessary pointer and fix test spelling

* fix unit tests and add a new one for when passing a valid email

* fix go lint

Co-authored-by: Pablo Velez Vidal <pablo.velez@mattermost.com>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

model/cloud.go

@@ -84,6 +84,10 @@ type CloudCustomer struct {
 	PaymentMethod  *PaymentMethod `json:"payment_method"`
 }
 
+type ValidateBusinessEmailRequest struct {
+	Email string `json:"email"`
+}
+
 // CloudCustomerInfo represents editable info of a customer.
 type CloudCustomerInfo struct {
 	Name             string `json:"name"`