[release-1.8] 🌱 Bump corefile-migration library to v1.0.26

[sbueringer]

Signed-off-by: Stefan Büringer [email protected]

What this PR does / why we need it:

Manual cherry-pick of #12058

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 #

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[sbueringer]

/assign @fabriziopandini @chrischdi

[chrischdi]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 29ced84d393bdb7779baf8766169a94f6d10dc35

[k8s-ci-robot]

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