Content types and schema are not synced when imported

[philipbushnell-valtech]

It appears the provider doesn't sync the content types and their schemas when terraform is applied and the changes are imported.

Steps to reproduce:

• Add a content type schema
• Add a content type for the schema
• Apply
• Create content using this content type in Dynamic Content
• Update the schema (e.g. turn a string field into a number field)
• Apply
• Refresh in Dynamic Content and it's still the old schema (e.g. the string field, not a number field)

@pimvernooij has suggested to raise this as the functionality has apparently not been implemented yet.

[tleguijt]

At the moment this requires a manual action. It would be nice if we could do this via the API (and thus; implement in the provider)

[tleguijt]

Example https://github.com/amplience/dc-management-sdk-js/blob/master/src/lib/model/ContentType.ts#L138