Secondary data model does not get updated if it is only referenced through text resources

### Description of the bug

An action button updates a secondary data model, but the text referencing this model does not get updated. The secondary data model is only referenced through text resources and not by any component data model bindings or expressions.

I have not been able to reproduce this yet, but I am quite confident that this happens because the model is not stored in the FormDataWrite provider but only the GlobalDataModelReaders. When the action button updates data models, it tries to update it in FormDataWrite, but since no components reference it through data model bindings or expressions, it does not exist there, so nothing happens.

Slack: https://altinn.slack.com/archives/C02EJ9HKQA3/p1736426068728089

### Steps To Reproduce

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### Additional Information

_No response_