Move test projects from src/ to tests/ (#11357)

* Update gitignore

* Move csproj

* Update project references

* Update solutions

* Update build scripts

* Tests used to share editorconfig with projects in src

* Fix broken tests.

* Stop copying around .editorconfig

merged root one with linting

* csharp_style_expression_bodied -> suggestion

* Move StyleCop rulesets to matching directories and update shared build properties

* Remove legacy build files, update NuGet.cofig and solution files

* Restore myget source

* Clean up .gitignore

* Update .gitignore

* Move new test classes to tests after merge

* Gitignore + nuget config

* Move new test

Co-authored-by: Ronald Barendse <ronald@barend.se>

tests/Umbraco.Tests.Benchmarks/Umbraco.Tests.Benchmarks.csproj

@@ -0,0 +1,31 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+    <OutputType>Exe</OutputType> 
+    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
+  </PropertyGroup>
+  <ItemGroup>
+    <None Remove="CtorInvokeBenchmarks.cs.bak" />
+    <None Remove="ReflectionUtilities-Unused.cs.bak" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="app.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Umbraco.Core\Umbraco.Core.csproj" />
+    <ProjectReference Include="..\..\src\Umbraco.Infrastructure\Umbraco.Infrastructure.csproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="BenchmarkDotNet">
+      <Version>0.13.1</Version>
+    </PackageReference>
+    <PackageReference Include="Microsoft.Extensions.Logging.Debug">
+      <Version>5.0.0</Version>
+    </PackageReference>
+    <PackageReference Include="Moq">
+      <Version>4.16.1</Version>
+    </PackageReference>
+    <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />    
+    <PackageReference Include="System.Reflection.Emit" Version="4.7.0" />
+  </ItemGroup>  
+</Project>