BZ-1994420: Added a link to OCP Update Graph

[sagidlow]

Applies to 4.6+
BZ Link: https://bugzilla.redhat.com/show_bug.cgi?id=1994420
Preview Link: OpenShift Container Platform upgrade channels and releases. Scroll down to Upgrade version paths, and see the NOTE.
QE Ack needed.

[sagidlow]

Please review: @wking and @xltian

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[codyhoag]

LGTM!

[sagidlow]

@xltian Please review this pending PR.

[wking]

As I pointed out in the bug, I'd prefer pointing folks at in-cluster tools for this sort of thing, especially as cluster-specific things like openshift/enhancements#427 and openshift/enhancements#821 make relying on out-of-cluster summaries less useful. But this same language (with slightly different link bounds) is already over in the mirroring docs, so I'm 🤷 on including it here too.

[xltian]

@jiajliu to review for QE.

[jiajliu]

I also agreed with @wking. And QE don't refer to Red Hat Upgrade labs for the test.
Firstly, the link is not needed in most of upgrades(such as connected clusters), users can get suggested available update from both oc and web-console after selecting proper channel.
Secondly, for the disconnected cluster's upgrade, which users need decide the mirrored payloads. I think there is indeed some gaps, and we'd better to fix the gap through some in-cluster ways instead of a out-of-cluster tool, which may be not consistent with update service data all the time.
What's more, to be a temporary proposal, now the link is already included in the doc. So i think there is no need to included it here again, and maybe it will mislead all users to check the Red Hat Upgrade labs first even it already got the available update from upstream.

[sagidlow]

Closing this PR as the comments provided by QE and SME leads me to believe this change is not needed. Closing BZ as WILLNOTFIX.