upgpkg: 4.4-2: Use dotnet 8.0 and internal harfbuzz

Hurricane Pootisrequested to merge
hurricanepootis/godot:upgrade into main

This is a merge request to do the following:

  1. Update to 4.4
  2. Pegs dotnet version at dotnet 8.0, as Godot has the minimum version at 8.0. I don't know if 9.0 can be used, but I think if they're going to make 8.0 the "default" (or whatever), it should also be the one we build with. Here is the pr.
  3. Use Godot's own harfbuzz and harfbuzz-icu. There is a bug with using system harfbuzz apparently. The flatpak also switched to the built-in harfbuzz, so I think we should too

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