Delete the receivers, receiversCc fields, delete api alert-group/grant-user, projects/{projectName}/executors/get-receiver-cc (#4409)

* Replace the front-end code of the plugin branch with the front-end code of the dev branch

* fix

* fix

* fix

* fix

* Delete the receivers, receiversCc fields, delete api alert-group/grant-user, projects/{projectName}/executors/get-receiver-cc