Revert "fix _user_data_change fails assertion after a soft clean"

[danpawlik]

Reverts #3514

Currently, many of the CI jobs "catch" the new assertion:

TASK [config_drive : Assert we don't try to change an existing ISO that=['_meta_data_change is not changed', '_user_data_change is skipped or _user_data_change is not changed', '_net_data_change is not changed'], msg=You're trying to edit an existing ISO. This isn't possible, since the ISO is usually attached to a virtual machine, and you cannot dynamically edit it.] ***
Wednesday 17 December 2025  08:16:54 +0000 (0:00:01.031)       0:08:14.694 ****
Wednesday 17 December 2025  08:16:54 +0000 (0:00:01.031)       0:08:14.693 ****
task path: /home/zuul/src/github.com/openstack-k8s-operators/ci-framework/roles/config_drive/tasks/main.yml:81
fatal: [hypervisor]: FAILED! =>
    assertion: _user_data_change is skipped or _user_data_change is not changed
    changed: false
    evaluated_to: false
    msg: You're trying to edit an existing ISO. This isn't possible, since the ISO is
      usually attached to a virtual machine, and you cannot dynamically edit it.

[pinikomarov]

LGTM

[rebtoor]

/approve

/lgtm

[openshift-ci]

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