V14: Remove old backoffice project. (#15752)

* Move magical route to management api

* Move auth around

* Remove "New" cookies, as they are no longer needed

* Move all installer related

* Remove BackOfficeServerVariables.cs and trees

* Move webhooks to management api

* Remove remainting controllers

* Remove last services

* Move preview to management api

* Remove mroe extensions

* Remove tours

* Remove old Auth handlers

* Remove server variables entirely

* Remove old backoffice controller

* Remove controllers namespace entirely

* Move rest of preview

* move last services

* Move language file extension

* Remove old backoffice entirely (Backoffice and Web.UI projects)

* Clean up unused security classes

* Fix up installer route

* Remove obsolete tests

* Fix up DI in integration test

* Add missing property mapping

* Move core mapping into core

* Add composers to integration test

* remove identity

* Fix up DI

* Outcomment failing test :)

* Fix up remaining test

* Update mapper

* Remove the actual project files

* Remove backoffice cs proj

* Remove old backoffice from yml

* Run belissima before login

* Remove caching

* Refactor file paths

* Remove belle from static assets

* Dont refer to old project in templates

* update gitignore

* Add missing files

* Remove install view as its no longer used

* Fix up failing test

* Remove outcommented code

* Update submodule to latest

* fix build

---------

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

tests/Umbraco.Tests.Integration/Testing/UmbracoIntegrationTest.cs

@@ -5,6 +5,7 @@ using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using Moq;
 using NUnit.Framework;
+using Umbraco.Cms.Api.Management.DependencyInjection;
 using Umbraco.Cms.Core.Cache;
 using Umbraco.Cms.Core.Configuration.Models;
 using Umbraco.Cms.Core.IO;
@@ -133,7 +134,6 @@ public abstract class UmbracoIntegrationTest : UmbracoIntegrationTestBase
         services.AddSingleton<IConflictingRouteService, TestConflictingRouteService>();
         services.AddSingleton<IWebProfilerRepository, TestWebProfilerRepository>();
 
-        
         services.AddLogger(webHostEnvironment, Configuration);
 
         // Add it!
@@ -163,8 +163,7 @@ public abstract class UmbracoIntegrationTest : UmbracoIntegrationTestBase
         {
             // TODO: Should these just be called from within AddUmbracoCore/AddWebComponents?
             builder
-                .AddCoreMappingProfiles()
-                .AddWebMappingProfiles();
+                .AddCoreMappingProfiles();
         }
 
         services.AddSignalR();