* [Setup] Add support for installing both dotnet 3 and 5 (#12306)
* [PowerToys Run] Update to net5 (#12286)
* Change targets of projects
* Update Microsoft.Toolkit.Uwp.Notifications,
changed TargetFramework for PowerLauncher project in order to resolve an issue with ModernWpf
* Specify windows version in order to fix build errors
* Fixed suppressed warnings
* Updated sdk
* Removed usage of obsolete GlobalAssemblyCache
* Removed obsolete DesktopNotificationManagerCompat
* Update nuget versions
* Update installer
* [PowerToys Run] Obsolete APIs and warnings introduced in .net5 (#12423)
* Change targets of projects
* Update Microsoft.Toolkit.Uwp.Notifications,
changed TargetFramework for PowerLauncher project in order to resolve an issue with ModernWpf
* Fixed suppressed warnings
* Removed obsolete DesktopNotificationManagerCompat
* Get rid of binary formatter
* Update tests
* Don't include new image cache file to the report
* There's no need to call IsOwner as it doesn't make sense
* Fix different nullability exception
* Exclude extra dlls from tests
Co-authored-by: Andrey Nekrasov <yuyoyuppe@users.noreply.github.com>
