Bug: Openseadragon JS load order when BigPipe is enabled

[jordandukart]

In Islandora/openseadragon#26 OSD was moved over to use a CDN to serve up the OpenSeadragon library. With the big_pipe module enabled it's possible to run into racey scenarios where the external JS is not loaded prior to the instantiation of the viewer being done by the module itself.

We'd likely want to provide the end-user the ability to use a locally referenced copy of the library as opposed to the CDN such that the vast improvements that BigPipe provides can be leveraged.

See: https://www.drupal.org/project/geolocation/issues/3216917, https://www.drupal.org/project/webform/issues/3236382 and their related core issues.