Talos client can connect to Talos API via a proxy with basic auth.
Additionally it is now optional to specify a TLS CA,key or crt. Optionally
Developers can build talosctl with WITH_DEBUG=1 to allow insecure
connections when http:// endpoints are specified.
Fixes#5980
Signed-off-by: Philipp Sauter <philipp.sauter@siderolabs.com>
