Enable write test outputs from test executor

- [ ] This issue is blocking
- [ ] This issue is causing unreasonable pain

Now it is not easy to output messages to test results from RemoteExecutor callback.

example of a current solution:
```C#
[Fact]
public void TestMethod()
{
var logFilePath = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
File.WriteAllText(logFilePath, "");

try
{
RemoteExecutor.Invoke((logFilePath) => {
File.AppendAllText(logFilePath, "Message to log");
}, logFilePath).Dispose();
}
catch {
throw;
}
finally{
_output.WriteLine(File.ReadAllText(logFilePath));
// delete temp file
}
}
```

Proposed:
```C#
[Fact]
public void TestMethod()
{
RemoteExecutor.Invoke((_output) => {
_output.WriteLine("Message to log");
}, _output).Dispose();
}
```

The disadvantage of this proposal is the number of Invoke method overloads.