Entity Framework Core Support (#14109)

* Add UmbracoEFCore project

* Add EFCore composer

* Add Locking Mechanisms

* Add scope interfaces

* Add excecute scalar extension method

* fix up query in locking mechanism

* Add scoping

* Add scoping

* Add test DbContext classes

* add locking test of EFCore

* Creat ScopedFileSystemsTests

* Add EFCoreScopeInfrastructureScopeLockTests

* Add EFCoreScopeInfrastructureScopeTests

* Add EFCoreScopeNotificationsTest.cs

* Add EFCoreScopeTest.cs

* Remake AddUmbracoEFCoreContext to use connection string

* Remove unused code from extension method

* Reference EFCore reference to Cms.csproj

* Remove unused parameter

* Dont have default implementation, breaking change instead

* Add compatability suppression file

* Updated EFCore packages

* Use timespan for timeout

* Allow overriding default EF Core actions

* Option lifetime needs to be singleton

* Use given timeout in database call

* dont use timespan.zero, use null instead

* Use variable timeout

* Update test to use locking mechanism

* Remove unneccesary duplicate code

* Change to catch proper exception number

---------

Co-authored-by: Zeegaan <nge@umbraco.dk>
Co-authored-by: Bjarke Berg <mail@bergmania.dk>

tests/Umbraco.Tests.Integration/Umbraco.Tests.Integration.csproj

@@ -21,6 +21,7 @@
   <Import Project="..\..\src\Umbraco.Cms.Targets\buildTransitive\Umbraco.Cms.Targets.targets" />
 
   <ItemGroup>
+    <ProjectReference Include="..\..\src\Umbraco.Cms.Persistence.EFCore\Umbraco.Cms.Persistence.EFCore.csproj" />
     <ProjectReference Include="..\..\src\Umbraco.Cms\Umbraco.Cms.csproj" />
     <ProjectReference Include="..\Umbraco.Tests.Common\Umbraco.Tests.Common.csproj" />
   </ItemGroup>