Fixed #25657 -- Ignored exceptions when destroying geometry objects

Due to randomness of garbage collection with geometry objects, it's
easier to simply ignore AttributeError/TypeError generally raised when
parts of objects are already garbage-collected.
Thanks Sergey Fedoseev and Tim Graham for reviewing the patch.

django/contrib/gis/gdal/raster/source.py

@@ -131,8 +131,10 @@ class GDALRaster(GDALBase):
             raise GDALException('Invalid data source input type: "{}".'.format(type(ds_input)))
 
     def __del__(self):
-        if self._ptr and capi:
+        try:
             capi.close_ds(self._ptr)
+        except (AttributeError, TypeError):
+            pass  # Some part might already have been garbage collected
 
     def __str__(self):
         return self.name