Store transform where GDAL will find it

[snowman2]

https://gdal.org/drivers/raster/netcdf.html#georeference

 NetCDF driver will try to read the following metadata directly and set up georeferencing.
    spatial_ref (Well Known Text)
    GeoTransform (GeoTransform array)

It is probably worth doing for the case where parse_coords=False when reading a file and then it is written to netCDF. Also, I believe this is another part that goes along with #81

Currently, it is just stored in the transform attribute.

[snowman2]

Example: https://github.com/OSGeo/gdal/blob/0ea4187a72b4aee40b46399dc6b082d49ae83c2f/autotest/gdrivers/data/netcdf/byte.nc.txt#L18