Kubernetes deprecates working with docker

Therse is several managing tools, so use plural form.

Now that 8CB based workstations start pouring in,
let's prepare the configuration for 1E8CB mobos
(3 PCIe slots so 1/2/3-seaters possible and tested).

With exceptoon for tegra: celluloid segfaults there.

From server profile.
And dropped alterator-gpupdate from the.pkgs list:
it in the new admc list now.

SCADA scada is included in engineering-APCS metapackage.

Suggested by mike@.

This should have been done when reworking Workstation,
but better that late than making a copy for Education.

NB: directory name has been chosen to both sort late
    (so that functionality related checkboxes come first
    and graphics setup related ones sit down there), and
    to relate to X11 as well.

Some pkggroups were numbered (thus ordered) and some weren't;
let's make those uniform instead of depending on Latin alphabet:

kde5 -> 06_kde5
teacher -> 07_teacher
server-apps-edu -> 08_server-apps-edu
video-conferencing -> 09_video-conferencing

There's no full KDE Plasma 5 environment available on e2k yet
but many libraries, frameworks and apps are there already;
I chose to provide a distinkt pkggroup so that this subset
doesn't get confused with the whole KDE 5.

Four checkboxes with "Elbrus 801-PC" prefix look a bit too much,
let's put these under a parent one; the counter-argument is that
selecting that parent checkbox is going to provide message telling
that there are conflicts within -- the proper widget would be a
dropbox with the number of seats but we don't do that just yet
in alterator-pkg.

The autologin group goes there too; still a hack that should be
replaced by proper alterator-users multiseat support.

This has been suggested by a customer.

This started as a three-seater 801-PC support for
ALT Education 9.0 for Elbrus.

...and leave the choice up to runtime scripts and the user.

These have been:
- taken from x86_64 server iso (in substituted form);
- checked against m-p-d where needed;
- renamed from centaurus-* to centaurus/*;
- updated with s/samba-server/samba/;
- archdep bits adjusted for m-p-d/m-p syntax difference;
- amended with some tester feedback based additions included;
- pruned regarding p9/branch packages availability.