Allow updating the configuration and parent of a ModelVersion

https://redmine.teklia.com/issues/9210

src/components/Model/Versions/EditModal.vue should have two additional fields to allow editing the configuration and parent of a ModelVersion.

The configuration should be a <textarea> where the existing configuration is shown as an indented JSON. Just like with worker configurations in JSON mode, JSON.parse should be called after any change to this value, and any SyntaxError errors should be caught and shown as help is-danger errors. Only objects are allowed as well, not arrays or other primitive types. Leaving the field completely empty should result in {} being used, just to make it easier to clear the configuration.

The parent should use the ModelVersionPicker.vue component, which we had used in training processes then never removed. Trying to make the model version a parent of itself should show a help is-danger error.