test: error messages from Godot when tests exit

[wlsnmrk]

During local testing (on a Windows box) with AutoInject.Tests, at the time Godot exits, I get an error reading:

CLR: Assert failure(PID 9412 [0x000024c4], Thread: 27244 [0x6a6c]): !"Attempt to execute managed code after the .NET runtime thread state has been destroyed."
    File: D:\a\_work\1\s\src\coreclr\vm\ceemain.cpp:1818 Image:
C:\Users\Mark\AppData\Roaming\godotenv\godot\bin\godot.exe

This error doesn't occur in the Ubuntu VM for the GH workflow, but there it reports:

WARNING: 13 RIDs of type "CanvasItem" were leaked.
     at: _free_rids (servers/rendering/renderer_canvas_cull.cpp:2678)
WARNING: ObjectDB instances leaked at exit (run with --verbose for details).
     at: cleanup (core/object/object.cpp:2514)