Teach creation commands about buffer-local contexts

Teach creation commands about buffer-local contexts

* kubed.el (kubed-list-create): Remove obsolete comment.
(kubed-define-resource): Refine interactive spec for
generated 'kubed-create-RESOURCE' commands.
(kubed-create-namespace, kubed-create-job)
(kubed-create-job-from-cronjob, kubed-create-deployment)
(kubed-create-cronjob, kubed-create-ingress, kubed-create):
Honor buffer-local context and namespace.
* kubed-transient.el (kubed-transient-create): Bind more
commands, add "--context=" infix arg, update layout.
(kubed-transient-create-cronjob)
(kubed-transient-create-ingress)
(kubed-transient-create-deployment)
(kubed-transient-create-job): Add "--context=" infix arg.