[PostGIS] #5899: pg_upgrade fails restore geography because spatial_ref_sys does not exist

[PostGIS]

#5899: pg_upgrade fails restore geography because spatial_ref_sys does not exist
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  Reporter:  robe     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.7.0
 Component:  postgis  |    Version:  3.4.x
Resolution:           |   Keywords:
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Comment (by pramsey):

 Have confirmed the hack works, was able to recreate failure mode and then
 fix it with the new approach.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5899#comment:14>
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