proj_create_crs_to_crs(): restore behaviour of PROJ 9.1 #3707
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Fixes https://lists.osgeo.org/pipermail/proj/2023-April/011003.html that is ``cs2cs EPSG:4326+5773 EPSG:4326+5782`` without grids available. Fixes situations where getting operations in PROJ_GRID_AVAILABILITY_KNOWN_AVAILABLE mode returns one single gridded operations where the grid isn't available or a ballpark operation. We retry in PROJ_GRID_AVAILABILITY_DISCARD_OPERATION_IF_MISSING_GRID mode to get a potential ballpark operation. Follow-up to similar fix of OSGeo#3614
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proj_create_crs_to_crs(): restore behaviour of PROJ 9.1
Fixes https://lists.osgeo.org/pipermail/proj/2023-April/011003.html
that is
cs2cs EPSG:4326+5773 EPSG:4326+5782without grids available.Fixes situations where getting operations in PROJ_GRID_AVAILABILITY_KNOWN_AVAILABLE
mode returns one single gridded operations where the grid isn't available or
a ballpark operation.
We retry in PROJ_GRID_AVAILABILITY_DISCARD_OPERATION_IF_MISSING_GRID
mode to get a potential ballpark operation.
Follow-up to similar fix of #3614