SetupFakeDriver sometimes causes failure in the unit test.

[BDisp]

          Yes, because sometimes it causes failure in the `With_Subview_Using_PosFunc` unit test. See https://github.com/gui-cs/Terminal.Gui/actions/runs/11903293490/job/33169963032. The reason is a racing condition where the `SetupFakeDriver` was resizing the terminal to (5,5) and when the above unit test is running the terminal size isn't what it's expected and corrupt the expected value.

  Failed Terminal.Gui.LayoutTests.DimAutoTests.With_Subview_Using_PosFunc [3 ms]
  Error Message:
   Assert.Equal() Failure: Values differ
Expected: 25
Actual:   20
  Stack Trace:
     at Terminal.Gui.LayoutTests.DimAutoTests.With_Subview_Using_PosFunc() in /home/runner/work/Terminal.Gui/Terminal.Gui/UnitTests/View/Layout/Dim.AutoTests.PosTypes.cs:line 647
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

Originally posted by @BDisp in #3828 (comment)

[BDisp]

Another failure in https://github.com/gui-cs/Terminal.Gui/actions/runs/11921947611/job/33227171381. Don't know if it's related.

  Failed Terminal.Gui.ViewTests.NeedsDrawTests.NeedsDraw_False_After_SetRelativeLayout_10x10 [< 1 ms]
  Error Message:
   Assert.True() Failure
Expected: True
Actual:   False
  Stack Trace:
     at Terminal.Gui.ViewTests.NeedsDrawTests.NeedsDraw_False_After_SetRelativeLayout_10x10() in /home/runner/work/Terminal.Gui/Terminal.Gui/UnitTests/View/Draw/NeedsDisplayTests.cs:line 188
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

[BDisp]

Thanks for the labels. I forgot 😃

[BDisp]

Reopening this because there is still a bug in the SetupFakeDriver.