Handle the migration to the new TXT format. Catch up to the merged version

[alebedev87]

• The merged version of the upstream Handle the migration to the new TXT format: create missing records kubernetes-sigs/external-dns#2811 drifted from the cherry pick we used in UPSTREAM 2811: Handle the migration to the new TXT format - create missing records #43.
• New problem was found with the migration code. It was fixed in Handle the migration to the new TXT format: missing records to be created separately kubernetes-sigs/external-dns#2913.

The goal of this PR is to catch up on those changes.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alebedev87

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[openshift-ci]

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[Miciah]

Thanks!
/lgtm

[alebedev87]

/label docs-approved
/label px-approved

Nothing changed on this side

[alebedev87]

Putting the QE label to let the image be published, so that it can be used in the operator repository where QE will give its greenlight: PR.

/label qe-approved