Add [ConstructorAttribute] to System.Runtime.Serialization

[StevePy]

Minor QoL request for discussion:

Currently when working with either Newtonsoft or System.Text.Json, these serializers rely on their own [JsonConstructorAttribute] while support/use Runtime.Serialization attributes like [DataContractAttribute] and [DataMemberAttribute]. DTOs that I serialize to JSON typically only need System.Runtime.Serialization for configuring attributes until I need to specify a constructor, then I need to ensure I've selected the right one. It would be nice if the deserialization constructor marking was recognized with an attribute in Runtime.Serialization and recognized by both System.Text.Json and Newtonsoft. (As well as other serialization libraries that allow nominating a constructor)

[huoyaoyuan]

System.Runtime.Serialization is not evolving. Moreover, System.Text.Json doesn't support [DataMemberAttribute] etc.