Update DEA Tools functions to be compatible with `odc.geo`

[robbibt]

The odc.geo package has been written to eventually replace how datacube deals with spatial information (i.e. reprojecting/warping/geotransforms etc).

Currently any spatially-aware code in DEA Notebooks accesses a datacube "Geobox" like this:

ds.geobox

To make the eventual transition to odc.geo smoother, we should update our DEA Tools functions to also support accessing spatial info via the odc.geo .odc accessor:

ds.odc.geobox

This would largely affect functions in the dea_tools.spatial module.

[robbibt]

Being dealt with in more granular issues, e.g. #1076