[PostGIS] #6055: Specify search_path carefully during extension install

[PostGIS]

#6055: Specify search_path carefully during extension install
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 Reporter:  pramsey  |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  high     |  Milestone:  PostGIS 3.6.2
Component:  postgis  |    Version:  3.2.x
 Keywords:           |
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 In order to keep the permissions situation clean during extension install.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6055>
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