[PostGIS] #4934: Deprecate topology function creating invalid topologies

[PostGIS]

#4934: Deprecate topology function creating invalid topologies
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  Reporter:  strk      |      Owner:  robe
      Type:  task      |     Status:  new
  Priority:  medium    |  Milestone:  PostGIS 3.5.0
 Component:  topology  |    Version:  2.5.x -- EOL
Resolution:            |   Keywords:
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Changes (by robe):

 * owner:  strk => robe
 * type:  enhancement => task
 * milestone:  PostGIS Fund Me => PostGIS 3.5.0

Comment:

 I've put in the docs that AddEdge is now deprecated and
 TopoGeo_AddLineString should be used instead at [2e4d9639/git].  Still
 need to change the function to show a deprecated notice
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4934#comment:4>
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