[Enhancement] Add net9.0 and net10.0 targets #1822

coverlet NuGet packages (coverlet.collector, coverlet.msbuild, coverlet.console, coverlet.MTP)
currently ship only a net8.0 TFM asset folder (driven by $(NetMinimum) = net8.0).
When a user's machine has only the .NET 9 or .NET 10 SDK installed the tracker class injected
at instrumentation time cannot load System.Runtime 8.0.0.0, causing a TypeInitializationException
at test-run time (see #1818).

Adding net9.0 and net10.0 TFM asset folders to each package allows the runtime assembly
resolver to pick the TFM-appropriate copy automatically.

Strategy