* Add move/copy operations to datatype API
* Add compat suppressions for new interface methods
* Regenerate OpenAPI JSON
* Update OpenApi.json
* Ensure we can copy a datatype to root + make the target key nullable (explicit) for move and copy operation models
* Handle parent not found status
* Update the OpenAPI spec to reflect new nullability
* Cleanup
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Co-authored-by: Elitsa Marinovska <elm@umbraco.dk>
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