Core - Build BrowserSubProcess for net6.0-windows

- This is only for local builds, we still only ship a .Net Core 3.1 exe (.Net 5.0 for arm64)
- Potentially we should always use the netcoreapp3.1 exe to mimic what's happening when using the nuget packages
  That would require changes to the .targets file to copy the correct exe based on arch

Author: amaitland

CefSharp.BrowserSubprocess/CefSharp.BrowserSubprocess.netcore.csproj

@@ -12,7 +12,8 @@
 
     <PropertyGroup>
         <OutputType>WinExe</OutputType>
-        <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
+        <TargetFrameworks>netcoreapp3.1;net5.0-windows</TargetFrameworks>
+        <TargetFrameworks Condition="'$(VisualStudioVersion)'=='17.0'">$(TargetFrameworks);net6.0-windows</TargetFrameworks>
         <RootNamespace>CefSharp.BrowserSubprocess</RootNamespace>
         <AssemblyName>CefSharp.BrowserSubprocess</AssemblyName>
         <GenerateAssemblyInfo>false</GenerateAssemblyInfo>

NuGet/PackageReference/CefSharp.Common.NETCore.nuspec

@@ -81,8 +81,8 @@
 	<file src="..\..\CefSharp.BrowserSubprocess\bin.netcore\x64\Release\netcoreapp3.1\CefSharp.BrowserSubprocess.runtimeconfig.json" target="runtimes\win-x64\native"/>
 
 	<!-- For arm64, we use the net5.0 version of CefSharp.BrowserSubprocess since .NET 5.0 officially supports creating Windows ARM64 apps -->
-	<file src="..\..\CefSharp.BrowserSubprocess\bin.netcore\arm64\Release\net5.0\CefSharp.BrowserSubprocess.dll" target="runtimes\win-arm64\native"/>
-	<file src="..\..\CefSharp.BrowserSubprocess\bin.netcore\arm64\Release\net5.0\CefSharp.BrowserSubprocess.exe" target="runtimes\win-arm64\native"/>
-	<file src="..\..\CefSharp.BrowserSubprocess\bin.netcore\arm64\Release\net5.0\CefSharp.BrowserSubprocess.runtimeconfig.json" target="runtimes\win-arm64\native"/>
+	<file src="..\..\CefSharp.BrowserSubprocess\bin.netcore\arm64\Release\net5.0-windows\CefSharp.BrowserSubprocess.dll" target="runtimes\win-arm64\native"/>
+	<file src="..\..\CefSharp.BrowserSubprocess\bin.netcore\arm64\Release\net5.0-windows\CefSharp.BrowserSubprocess.exe" target="runtimes\win-arm64\native"/>
+	<file src="..\..\CefSharp.BrowserSubprocess\bin.netcore\arm64\Release\net5.0-windows\CefSharp.BrowserSubprocess.runtimeconfig.json" target="runtimes\win-arm64\native"/>
   </files>
 </package>