hotfix(devel): Fix release migration

Version Control Information

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

Commits:

* release-migrations: Capture new Terraform state

  Fixes-up: 689e6c6c3 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: !2209 (v11.0)

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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.