Ubuntu Support Tracking

This issue tracks Ubuntu releases over time.

- https://github.com/dotnet/core/issues/9583
- https://github.com/dotnet/core/issues/9112
- https://github.com/dotnet/core/issues/8171
- https://github.com/dotnet/core/issues/7038
- https://github.com/dotnet/core/issues/5850
- https://github.com/dotnet/core/issues/5017
- https://github.com/dotnet/core/issues/5429
