fix(mason_logger): Don't print the spinner when output is not a tty

[bartekpacia]

This is a revival od #385.

Let's say that I have the following method:

Future<void> _installServer({
  required String device,
  required bool debug,
}) async {
  final progress = log.progress('Installing server');
  try {
    await _forceInstallApk(
      path: _artifactsRepository.serverArtifactPath,
      device: device,
      packageName: _serverPackage,
    );
  } catch (err) {
    progress.fail('Failed to install server');
    rethrow;
  }
  progress.complete('Installed server');
}

Locally, it works fine, but when run on GitHub Actions (so a non-interactive shell), the output is pretty horrible:

I suggest mason_logger take the same approach as the pub tool takes – don't print the spinner when the process' output is not a tty. See relevant code.

[bartekpacia]

This got better after merging #549: