fix(swagger) Fix openapi issues (#5123)

* * fix api version
* fix license info
* fix error response schema
* fix other typos & mistakes

* * remove unused tag

* * fix helm issues

api/http/handler/handler.go

@@ -78,8 +78,8 @@ type Handler struct {
 
 // @contact.email info@portainer.io
 
-// @license.name
-// @license.url
+// @license.name zlib
+// @license.url https://github.com/portainer/portainer/blob/develop/LICENSE
 
 // @host
 // @BasePath /api
@@ -121,8 +121,6 @@ type Handler struct {
 // @tag.description Manage Portainer settings
 // @tag.name status
 // @tag.description Information about the Portainer instance
-// @tag.name stacks
-// @tag.description Manage Docker stacks
 // @tag.name users
 // @tag.description Manage users
 // @tag.name tags