static async getClusters (req, res) {
    const clusters = await MiscAPIs.#getClusters();
    res.send(clusters);
  }
GET - /api/clusters

Retrieves a list of known configured Arkime clusters (if in
<a href="https://arkime.com/settings#multi-viewer-settings">Mulit Viewer mode</a>).
@name /clusters
@returns {Array} active - The active Arkime clusters.
@returns {Array} inactive - The inactive Arkime clusters.