Revert "Swap to dapper and system.text.json for database backend"

This reverts commit d2065bfa1b.

src/NzbDrone.Core.Test/Download/Pending/PendingReleaseServiceTests/RemoveRejectedFixture.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using FizzWare.NBuilder;
+using Marr.Data;
 using Moq;
 using NUnit.Framework;
 using NzbDrone.Common.Extensions;
@@ -46,7 +47,7 @@ namespace NzbDrone.Core.Test.Download.Pending.PendingReleaseServiceTests
                                    },
                        };
 
-            _movie.Profile = _profile;
+            _movie.Profile = new LazyLoaded<Profile>(_profile);
 
             _release = Builder<ReleaseInfo>.CreateNew().Build();