Complex type observable ordered value type collection support

[AndriySvyryd]

Non-observable and non-ordered collections of value types won't be supported initially. However, some non-ordered collections could be mapped to JSON objects, see #28861

Depends on #31237, #9906

[AndriySvyryd]

We will also add support for non-observable ordered collections of value types, but to get the best performance it will be the developer's responsibility to use the corresponding methods on entry.ComplexCollection(e => e.Collection) to inform EF of any operations that involve the order: insert, delete and move.