hotfix(v11.0): Fix release migration

Version Control Information

Source branch: hotfix/v11.0/hotfixes-for-v11.0.2 Target branch: release/v11.0

Commits:

* release-migrations: Capture new Terraform state

Fixes-up: 689e6c6c Use YAML based hosts file

* Add missing config read to release migration

The check in the yaml hosts release migration whether Terraform is enabled
 always yielded true since the fact was not actually read from the config.

Fixes-up: ebe4c830c fix migration for openstack clusters

* Make release migration idempotent

The script was not idempotent, we need to ignore unmatched files as the
migration may already happened.
Furthermore, use the long-term flag for force as a cosmetic improvement.

Fixes-up: 689e6c6c3a829cb5934e7032589631aa364ab945

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Related-hotfix: !2210 (devel)
Fixes-up: !1714 (merged)
Fixes-up: !2188 (merged)

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Merge Prerequisites

• MR title (and description) are descriptive
• Code is readable and syntactically correct
• Code is understandable
• Documentation has been updated, if necessary
• Commit messages look good
• Release note file in RST format added in latest commit

As a developer: please do not tick these boxes yourself. As a reviewer: please get yourself a hot cold beverage.