fix: force update the offline repo metadata cache

[dkoshkin]

What problem does this PR solve?:
This an issue thats wasn't caught in KIB tests because there are no upgrade tests here (as there shouldn't be).

This did not fail in Konvoy's e2e air-gapped preprovisioned upgrad tests because the package there was rebuilt more recently, but the FIPS packages were not.

I'm going to add a Konvoy FIPS preprovisioned upgrade test that would have caught this kind of issue in future. I ran the test with a customer KIB image built with this fix and it got updated:

  STEP: Upgrading the control-plane nodes @ 06/08/23 11:19:21.748
  /home/rocky/konvoy [update controlplane preprovisioned -c e2e-preprov-fips-upgrade-16862466 --kubeconfig /home/rocky/e2e-preprov-fips-upgrade-16862466.conf --kubernetes-version 1.26.3+fips.0]
  2023-06-08 18:19:21 INF  • Updating the control plane...
  2023-06-08 18:19:21 INF Updating control plane resource controlplane.cluster.x-k8s.io/v1beta1, Kind=KubeadmControlPlane default/e2e-preprov-fips-upgrade-16862466-control-plane
  2023-06-08 18:19:21 INF Waiting for control plane update to finish.
  2023-06-08 18:47:31 INF  ✓ Updating the control plane
  STEP: Upgrading the nodepool nodes @ 06/08/23 11:47:31.833
  /home/rocky/konvoy [update nodepool preprovisioned -c e2e-preprov-fips-upgrade-16862466 --kubeconfig /home/rocky/e2e-preprov-fips-upgrade-16862466.conf --kubernetes-version 1.26.3+fips.0 e2e-preprov-fips-upgrade-16862466-md-0]
  2023-06-08 18:47:32 INF  • Updating the e2e-preprov-fips-upgrade-16862466-md-0 node pool...
  2023-06-08 18:47:32 INF Updating node pool resource cluster.x-k8s.io/v1beta1, Kind=MachineDeployment default/e2e-preprov-fips-upgrade-16862466-md-0
  2023-06-08 18:47:32 INF Waiting for node pool update to finish.
  2023-06-08 18:59:22 INF  ✓ Updating the e2e-preprov-fips-upgrade-16862466-md-0 node pool

New tasks in KIB job:

TASK [repo : clean metadata for offline repository] ****************************
changed: [10.0.132.5]

TASK [repo : update the cache for offline repository] **************************
changed: [10.0.132.5]

Which issue(s) does this PR fix?:

• https://d2iq.atlassian.net/browse/D2IQ-97376

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[dkoshkin]

New tasks running when offline https://github.com/mesosphere/konvoy-image-builder/actions/runs/5215584257/jobs/9414509079?pr=829#step:9:1294

[dlipovetsky]

Interesting bug! Thanks for fixing, and the comment.