Adding net6.0 support (#115)

* Adding net6.0 support
Updating agent image
Updating to be on a supported TFM
Fixing agent version

* Creating dedicated console solution

Author: Keboo

IntelliTect.TestTools.TestFramework/ExampleTests/ExampleTests/ExampleTests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>