Adding a new api_version is too toilsome

It's currently too difficult and fiddly to add a new api_version. There are many test cases to update. Some of the test cases for manifest and upgrades incorporate a hash of the template, which need to be re-hashed and updated.

Look for test files related to manifests and upgrades, likely in a test/ directory. Identify where template hashes are computed and compared. Understand the current api_version addition process by examining existing versions. The goal is to simplify this process, reducing manual test updates and hash recalculations.

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