Support mapping multiple non-collection types to the same JSON column (JSON-splitting)

[AndriySvyryd]

This would allow mapping the properties of several non-collection types to a single JSON column. So a JSON object containing a mix of properties could be split into several types, e.g. Address and Details.

Also consider mapping entity type properties directly to JSON: #30094

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• Map part of the entity to Json column without the need of Owned entity container. #30094