Support more collections in JSON source generator

[layomia]

The JSON source generator currently supports only T[], List<T> (and derived types), and Dictionary<TKey, TValue> (and derived types) collections. It should support all collections supported by existing JsonSerializer functionality.

This is more relevant now since we do not have a trim-safe way to support most collections (#53205, #52268, #53256).

cc @eerhardt, @steveharter, @marek-safar, @jkotas

Tagging subscribers to this area: @eiriktsarpalis, @layomia
See info in area-owners.md if you want to be subscribed.

Issue Details

---

The JSON source generator currently supports only T[], List<T> (and derived types), and Dictionary<TKey, TValue> (and derived types) collections. It should support all collections supported by existing JsonSerializer functionality.

This is more relevant now since we do not have a trim-safe way to support most collections (#53205, #52268, #53256)

cc @eerhardt, @steveharter, @marek-safar, @jkotas

Author:	layomia
Assignees:	layomia
Labels:	area-System.Text.Json
Milestone:	6.0.0