Tell the tapes the simulator runs only while the starter watches it

The tapes looked for any process named as the chosen exe, every two seconds
off the UI thread. Under Wine the process is eu07.exe and never matched, so a
run never showed as running and the tape window did not follow the driven
vehicle, while a simulator started some other way was taken for the last
launch. The starter's own watch of the process it started now says it.

StarterNG.Tests/StartSimulationTests.cs

@@ -401,8 +401,6 @@ public class StartSimulationTests
         public bool OpenInShell(string pathOrUrl) => false;
 
         public IProcessHandle? FindRunning(string processName) => null;
-
-        public bool IsRunning(string processName) => false;
     }
 
     private sealed class RunningProcess : IProcessHandle