Adding importsToKeep to DataImportCron status

[gaohoward]

What this PR does / why we need it:

This PR adds a new field "importsToKeep" to the DataImportCron status
It is used to help users to get the effective importsToKeep value

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #4006

Special notes for your reviewer:

Release note:

It fixes issue #4006 

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign mhenriks for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[coveralls]

coverage: 49.413% (+0.03%) from 49.388%
when pulling d651083 on gaohoward:status-imports-to-keep
into c5480cc on kubevirt:main.

[gaohoward]

/retest

[awels]

I believe there is currently some maintenance going on, on the CI cluster, so this will likely fail for a bit

[awels]

/retest