`kubectl access wait-for` command

[heyLu]

It would be nice if there was a command to wait for access to be granted, so that there's no need for devs to check manually or for admins to notify people directly.

The command would check if there is a grant for the accessrequest in question and then exit with a successful return code when the request has been granted.

Desired workflow:

$ kubectl access request exec deployment/nginx cat /etc/nginx
created accessrequest access-exec-jane-p6scg (please wait for an admin to grant the permission)
$ kubectl access wait-for access-exec-jane-p6scg
waiting for access-exec-jane-p6scg to be granted
success, access-exec-jane-p6scg was granted by ...
$ kubectl exec deployment/nginx cat /etc/nginx/nginx.conf
...