error instead of panic if cloud endpoints are hit (#22211)

* error instead of panic when team edition receives a request to check on CWS availability.

api4/cloud.go

@@ -755,7 +755,12 @@ func handleCWSWebhook(c *Context, w http.ResponseWriter, r *http.Request) {
 }
 
 func handleCheckCWSConnection(c *Context, w http.ResponseWriter, r *http.Request) {
-	if err := c.App.Cloud().CheckCWSConnection(c.AppContext.Session().UserId); err != nil {
+	cloud := c.App.Cloud()
+	if cloud == nil {
+		c.Err = model.NewAppError("Api4.handleCWSHealthCheck", "api.server.cws.needs_enterprise_edition", nil, "", http.StatusBadRequest)
+		return
+	}
+	if err := cloud.CheckCWSConnection(c.AppContext.Session().UserId); err != nil {
 		c.Err = model.NewAppError("Api4.handleCWSHealthCheck", "api.server.cws.health_check.app_error", nil, "CWS Server is not available.", http.StatusInternalServerError)
 		return
 	}