Schema qualify all geometry casts in raster code, otherwise materialized views do not resture

References #4291 for PostGIS 3.0.0

git-svn-id: http://svn.osgeo.org/postgis/trunk@17314 b70326c6-7e19-0410-871a-916f4a2858ee
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Status Job ID Name Coverage
  Test
passed #174654093
test

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