Handle selected properties for List operations

[heaths]

For list operations (e.g. listDataSources) do not expose a parameter that allows the customer to pass $select. Many properties of models can't be in a $select, and they are case sensitive which may not be intuitive to languages that use typed models with different property casing.

Instead, provide a separate method for getting just names (e.g. listDataSourceNames), which the server optimizes. These methods should return a collection of strings.

[xiangyan99]

Fixed in #11739