Cleanup: BinningValue, AxisBounds + detray/Integration

[asalzburger]

This should not live for all too long:

  switch (bOption) {
    case BinningOption::closed:
      return detray::axis::bounds::e_circular;
    case BinningOption::open:
      return detray::axis::bounds::e_closed;
    default:
      throw std::invalid_argument(
          "DetrayMaterialConverter: unknown binning option detected.");
  }

[github-actions]

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