[PostGIS] #5775: ST_AsGeoJSONAgg which is aggregate version of ST_AsGeoJSON

[PostGIS]

#5775: ST_AsGeoJSONAgg which is aggregate version of ST_AsGeoJSON
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  Reporter:  robe     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.5.0
 Component:  postgis  |    Version:  master
Resolution:           |   Keywords:
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Comment (by pramsey):

 I mean, it removes one level of functions, but it will be at core mostly
 just copying pgsql core code. Why is the pgsql solution so unacceptable?
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5775#comment:2>
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