Add the displayOnCreate flag to the metadata block model and its fields

[GPortas]

Overview of the Feature Request

We need to add this flag to the metadata block and metadata field models so the SPA can know the required fields to print in the dataset creation form.

What kind of user is the feature intended for?
Package consumer

What inspired the request?
Frontend dev team discussion

Any open or closed issues related to this feature request?

• Extend the API to add the displayOnCreate flag in the DatasetFieldType and MetadataBlock payloads dataverse#10389