Bump to net8.0

[Gauvino]

Description

Overall update to .NET 8, need further testing and building test to see if everything working well.

• Update .NET to 8.0
• Update .NETFramework to 4.8.1
• Update packages versions
• Update MacOS to 12 since earlier version or not supported :
  https://github.com/dotnet/core/blob/main/release-notes/8.0/supported-os.md
• Remove clock and change add to append
• OS-release update to Ubuntu 20.04
• Fix task: NodeTool@0 to UseNode@1
• Fix task: reportgenerator@4 to reportgenerator@5

Todos

• Tests
• Translation Keys (./src/NzbDrone.Core/Localization/Core/en.json)
• Wiki Updates : Update to .NET 8 Servarr/Wiki#327

[mynameisbogdan]

You'll need to fix the code and tests for every major version bump for the packages like Sentry, System.IO.Abstractions.TestingHelpers, etc.

[Gauvino]

You'll need to fix the code and tests for every major version bump for the packages like Sentry, System.IO.Abstractions.TestingHelpers, etc.

I can't build at all cause there is too many warnings in error in the console if I can, I'll fix everything, but there is so many

[mynameisbogdan]

I pretty much know. 😀

Tried months ago myself to bump System.IO.Abstractions and gave up because I didn't had the time to deal with fixing every broken test.

[Gauvino]

I pretty much know. 😀

Tried months ago myself to bump System.IO.Abstractions and gave up because I didn't had the time to deal with fixing every broken test.

And doing so on every arr would be a week work at this point 😅

[mynameisbogdan]

Only Lidarr and Readarr uses System.IO.Abstractions, but still remains Sentry and others.