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>

einterfaces/cloud.go

@@ -25,7 +25,8 @@ type CloudInterface interface {
 
 	ChangeSubscription(userID, subscriptionID string, subscriptionChange *model.SubscriptionChange) (*model.Subscription, error)
 
-	RequestCloudTrial(userID, subscriptionID string) (*model.Subscription, error)
+	RequestCloudTrial(userID, subscriptionID, newValidBusinessEmail string) (*model.Subscription, error)
+	ValidateBusinessEmail(userID, email string) error
 
 	// GetLicenseRenewalStatus checks on the portal whether it is possible to use token to renew a license
 	GetLicenseRenewalStatus(userID, token string) error