[PostGIS] #6008: Add a Variant of ST_Polygon(raster) with Guaranteed Valid Geometry Output

[PostGIS]

#6008: Add a Variant of ST_Polygon(raster) with Guaranteed Valid Geometry Output
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  Reporter:              |      Owner:  robe
  GISuser5432            |
      Type:  task        |     Status:  new
  Priority:  high        |  Milestone:  PostGIS 3.6.1
 Component:  raster      |    Version:  3.6.x
Resolution:              |   Keywords:  PostGIS_Raster; ST_Polygon(rast);
                         |  Valid Geometry;
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Comment (by GISuser5432):

 Thanks Paul. If ST_MakeValid() is enough. Then, no need to modify the
 function.

 Yes, the actual ST_Polygon() also fails. I added it in another ticket:
 https://trac.osgeo.org/postgis/ticket/6009

 Only with 3.6 did not fail.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6008#comment:2>
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