[PostGIS] #5714: garden tests for topology

[PostGIS]

#5714: garden tests for topology
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 Reporter:  robe      |      Owner:  robe
     Type:  task      |     Status:  assigned
 Priority:  medium    |  Milestone:  PostGIS 3.5.0
Component:  topology  |    Version:  master
 Keywords:            |
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 Have garden tests similar to postgis proper and raster.

 Base part would create a blank topology and perhaps use inittopo to
 populate

 Subsequent tests would exercise all the functions with all geometry types
 similar to what we do with the other garden tests.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5714>
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