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

examples/openTelemetryConsole/openTelemetryConsole.csproj

@@ -7,7 +7,6 @@
   </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="OpenTelemetry" Version="1.6.0" />
         <PackageReference Include="OpenTelemetry.Exporter.Console" Version="1.6.0" />
         <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.0.0-rc9.14" />
     </ItemGroup>