Fix overflow in GeoTileGridTiler (#70222) #70290
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This PR uses longs to compute the number of tiles touching a bounding box
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When computing the number of tiles a bounding box might touch, we perform the calculation in integers which can overflow. In addition when calculating such value during rasterisation, we do not have into account the bounds in the bounded case, therefore we might overestimate the number of cells we might be touching.
This PR uses longs to compute the number of tiles touching a bounding box and bounds the value in the bounded case.
backport #70222