USHIFT-1413: Update prerun after storage migration design changes

[pmtk]

We won't aim toward running migration in prerun phase (instead it'll run in full cluster).
Therefore, removing all references to migration from prerun.
It can be now thought of as two, almost distinct, areas:

• data management (backup, restore, removal), and
• version metadata management

[openshift-ci-robot]

@pmtk: This pull request references USHIFT-1413 which is a valid jira issue.

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In response to this:

We won't aim toward running migration in prerun phase (instead it'll run in full cluster).
Therefore, removing all references to migration from prerun.
It can be now thought of as two, almost distinct, areas:

• data management (backup, restore, removal), and
• version metadata management

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[eggfoobar]

Small nit

[eggfoobar]

Maybe calling it something like checkVersionCompatibility might be better here.

Also the comment should remove reference to the bool return type.

[pmtk]

Thanks for catching that! Fixed

[dhellmann]

This looks good, aside from @eggfoobar's comment.

[eggfoobar]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: eggfoobar, pmtk

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[pmtk]

/retest-required

[openshift-ci]

@pmtk: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-openshift-conformance-reduced-arm	6ba6398	link	false	/test e2e-openshift-conformance-reduced-arm

Full PR test history. Your PR dashboard.

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