Rectify MachineSet creation docs across platforms

[maxwelldb]

Which section(s) is the issue in?

https://docs.openshift.com/container-platform/4.4/machine_management/creating_machinesets/creating-machineset-azure.html

What needs fixing?

There are a number of inconsistencies between MachineSet creation docs. There are also some additions and improvements to be made.

See discussion here: #21896 (comment)

And see this related PR: #20688

FYI @yrro

[openshift-bot]

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/lifecycle stale

[maxwelldb]

/remove-lifecycle stale

[openshift-bot]

Issues go stale after 90d of inactivity.

Mark the issue as fresh by commenting /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.
Exclude this issue from closing by commenting /lifecycle frozen.

If this issue is safe to close now please do so with /close.

/lifecycle stale

[yrro]

/remove-lifecycle stale