Move to net8.0 (#1463)

* Added net8.0 to the dotnet-version array used by actions

* Changed framework version in Directory.Build.props

* Removed unsed nuget

* Update codeql-analysis.yml

* Added net8.0 target framework

* Updated code analyzer version to match net8.0

* Added net8.0 to tests

* Updated sdk version

* Updated version.json

* Fixed build for non windows machines

* Updated references in Directory.Build.targets

* Added conditional exception handling to WatchServerDisconnect test case

* Added missing project to solution

src/KubernetesClient/KubernetesClient.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net6.0;net7.0</TargetFrameworks>
+        <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
         <RootNamespace>k8s</RootNamespace>
         <!-- seems bug in net7 json generator, some types missing in its result
             net8 is still in preview, will enable it after net8 release -->