[release/6.0] [tasks] [net472] Add ProjectReferences to JsonToItemsTaskFactory (...

[release/6.0] [tasks] [net472] Add ProjectReferences to JsonToItemsTaskFactory (#58917)

* [tasks] [net472] Add ProjectReferences to JsonToItemsTaskFactory

Reference the same versions of System.Threding.Tasks.Extensions and
System.Text.Json that MSBuild in Visual Studio 2022 uses.

Fixes build errors on maui-ios (and possibly blazorwasm) targets on Windows
like:

```
System.MissingMethodException: Method not found: 'System.Threading.Tasks.ValueTask`1<!!0> System.Text.Json.JsonSerializer.DeserializeAsync(System.IO.Stream, System.Text.Json.JsonSerializerOptions, System.Threading.CancellationToken)'.
   at JsonToItemsTaskFactory.JsonToItemsTaskFactory.JsonToItemsTask.<GetJsonAsync>d__24.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.Start[TStateMachine](TStateMachine& stateMachine)
   at JsonToItemsTaskFactory.JsonToItemsTaskFactory.JsonToItemsTask.GetJsonAsync(String jsonFilePath, FileStream file)
   at JsonToItemsTaskFactory.JsonToItemsTaskFactory.JsonToItemsTask.TryGetJson(String jsonFilePath, JsonModelRoot& json)
   at JsonToItemsTaskFactory.JsonToItemsTaskFactory.JsonToItemsTask.Execute()
   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   at
   Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext()
```

from `C:\Program
Files\dotnet\packs\Microsoft.NET.Runtime.MonoTargets.Sdk\6.0.0-rc.1.21451.13\Sdk\RuntimeComponentManifest.targets`

* assembly version is 4.2.0.1, but nuget version is 4.5.4, apparently

Co-authored-by: Aleksey Kliger <alklig@microsoft.com>