Update the Installing OpenShift on a single node instructions in the end user docs

[mburke5678]

openshift/openshift-docs#51152

The OKD end user docs have instructions for Installing "OpenShift on a single node" that is OCP-specific.

It needs to be significantly rewritten:

• users will need to use installer from github releases instead of mirror.openshift.com
• references to console.redhat.com need to be replaced with selfhosted assisted installer

The files are to be hidden on OKD docs until we can make these changes.

Assemblies:
installing/installing_sno/install-sno-preparing-to-install-sno.adoc
installing/installing_sno/install-sno-installing-sno.adoc

[binnes]

Need to wait until #2 is complete, so that content can be the basis of the docs

[JM1]

There are two ways to install SNO:

• using Agent-based Installer
• the older (i think) approach which is documented in the OCP docs

The Agent-based Installer approach will work when this has been merged. The OCP-documented approach works in 4.15 and will work in 4.14 when this has been merged.

[blaisep]

FWIW, I'm looking forward to this because I have a server in my homelab waiting for OKD.

[peterroth]

Good news:

~: oc get nodes
NAME           STATUS   ROLES                         AGE   VERSION
okd-sno-test   Ready    control-plane,master,worker   46m   v1.27.9+e36e183
~: oc get clusterversion
NAME      VERSION                          AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.14.0-0.okd-2024-01-26-175629   True        False         25m     Cluster version is 4.14.0-0.okd-2024-01-26-175629

Now just need to document it.

[peterroth]

Hello @mburke5678,
I started to document the required steps and got a question: as I saw in a previous commit you had, it's possible to mark if a part is only for OCP or if that's for OKD. Is it necessary to add ifndef::openshift-origin[] in case the given section is only for OCP?
My feeling is that it's required, but I'd like to be sure.

[GingerGeek]

Thanks @peterroth this is closed by ther merge of openshift/openshift-docs#71809