GPKG raster: add InspireCRS84Quad as more standard alias of PseudoTMS_GlobalGeodetic, and add a word of caution about GoogleCRS84Quad

git-svn-id: https://svn.osgeo.org/gdal/trunk@28154 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_with_coverage