[MM-28211] API pass-thru to the CWS for getting subscription (#15666)

* API pass-thru to the CWS for getting subscription

* Remove use of parameter in favour of env var

* Remove unnecessary param

* Removed unnecessary fields and added client4 method

* Some cleanup

* Translation fix

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

model/cloud.go

@@ -30,3 +30,16 @@ type StripeSetupIntent struct {
 type ConfirmPaymentMethodRequest struct {
 	StripeSetupIntentID string `json:"stripe_setup_intent_id"`
 }
+
+// Subscription model represents a subscription on the system.
+type Subscription struct {
+	ID         string   `json:"id"`
+	CustomerID string   `json:"customer_id"`
+	ProductID  string   `json:"product_id"`
+	AddOns     []string `json:"add_ons"`
+	StartAt    int64    `json:"start_at"`
+	EndAt      int64    `json:"end_at"`
+	CreateAt   int64    `json:"create_at"`
+	Seats      int      `json:"seats"`
+	DNS        string   `json:"dns"`
+}