OSDOCS 17238 Update MCO to reflect API changes made for Status Reporting

[mburke5678]

https://issues.redhat.com/browse/OSDOCS-17238

Link to docs preview:
Machine creation overview -> About checking machine config node status -- Added ImagePulledFromRegistry condition with TP snippet, Example machine config node output and preceding paragraph with TP snippet, and Additional Resource links.
Image mode for OpenShift -> Using the on-cluster image mode to apply a custom layered image -- Added verification step 4 with TP snippet, and Additional Resource link to the Feature Gate assembly.

QE review:

• QE has approved this change.

[ocpdocs-previewbot]

🤖 Tue Nov 25 21:47:03 - Prow CI generated the docs preview:

https://102021--ocpdocs-pr.netlify.app/
https://102021--ocpdocs-pr.netlify.app/openshift-enterprise/latest/machine_configuration/index.html
https://102021--ocpdocs-pr.netlify.app/openshift-enterprise/latest/machine_configuration/mco-coreos-layering.html

[mburke5678]

@isabella-janssen Can you PTAL?

[isabella-janssen]

/lgtm

Thanks @mburke5678!

[mburke5678]

@sergiordlr PTAL

[mburke5678]

@ptalgulk01 Can you PTAL?

[openshift-ci]

New changes are detected. LGTM label has been removed.

[ptalgulk01]

Hello @isabella-janssen , do we need to specify that to see the OCL images status update in MCN too, we need to have TechPreview ImageModeStatusReporting enable?

[isabella-janssen]

Hi @ptalgulk01, good catch. The TP warning does not seem to note that the config image values are also only TP. Would you be able to include that, @mburke5678?

[mburke5678]

@ptalgulk01 @isabella-janssen I added the requirement to enable TP feature gates in commit e5509e1. Thank you!!

[ptalgulk01]

looks good, Thankyou for taking a look!

[JoeAldinger]

A few suggestions, wasn't sure about CQA stuff in new PRs like this but I noted them just in case.

[openshift-ci]

@mburke5678: all tests passed!

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[mburke5678]

/cherrypick enterprise-4.21

[openshift-cherrypick-robot]

@mburke5678: new pull request created: #103068

In response to this:

/cherrypick enterprise-4.21

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