`GltfUtilities::computeBoundingRegion` set PoleTolerance by Tile

`GltfUtilities::computeBoundingRegion` need to add an input field for tile height to set pole tolerance as stated in the comments, i.e. `computedBounds.setPoleTolerance(0.001 * tileHeight);` for

https://github.com/CesiumGS/cesium-native/blob/70bd62a9f4883d26def3d1dddd08c6a67217ec86/CesiumGltfContent/src/GltfUtilities.cpp#L222

as in

https://github.com/CesiumGS/cesium-native/blob/main/CesiumRasterOverlays/src/RasterOverlayUtilities.cpp#L110

Start with CesiumGltfContent/src/GltfUtilities.cpp at computeBoundingRegion and compare the related logic in CesiumRasterOverlays/src/RasterOverlayUtilities.cpp. Add the tile-height input and verify that the resulting pole tolerance is set to 0.001 times the tile height, as described in the issue.

Written by the indexing model from the issue text.