MM-47420 - Add endpoint to fetch selfhosted products (#21678)

* created selfhosted endpoint

* make autogenerated mocks

* add test

* add user id

* remove user id requirement

* add tests

* send user id with request

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

einterfaces/cloud.go

@@ -10,6 +10,7 @@ import (
 type CloudInterface interface {
 	GetCloudProduct(userID string, productID string) (*model.Product, error)
 	GetCloudProducts(userID string, includeLegacyProducts bool) ([]*model.Product, error)
+	GetSelfHostedProducts(userID string) ([]*model.Product, error)
 	GetCloudLimits(userID string) (*model.ProductLimits, error)
 
 	CreateCustomerPayment(userID string) (*model.StripeSetupIntent, error)