TRAMP + Emacs 30

[johnhamelink]

Hi there,

I'm running Emacs from master branch. Emacs 29 comes with support for Kubernetes, Podman and Docker as TRAMP "inline methods" (see here).

• To start, we can use tramp-kubernetes-program as the default path for kubectl for Emacs 29+
• We should be able to transition away from implementing our own kubectl TRAMP method, and towards using the official kubernetes method instead.
  • Context & namespace should be defined with tramp-kubernetes-context and tramp-kubernetes-namespace (https://github.com/emacs-mirror/emacs/blob/master/etc/NEWS#L439).
  • Container an pod should be defined in the path: https://github.com/emacs-mirror/emacs/blob/master/lisp/net/tramp-container.el#L47