COLMAP not being compiled with cuda

[bertaveira]

Describe the bug
I was looking around and playing with the pixi environment and I noticed that the COLMAP used and specified in the lockfile is the CPU version so this is no longer GPU accelerated compared to manually compiling it.

Also looking at the docker image the changes on pull rerquest #3283 made it install pycolmap from pip which according to their documentation does not support cuda as it has to be manually installed for that as well as having colmap installed with cuda support. So since then the docker based usages also don't have pycolmap/colmap with cuda support.

I am not sure this makes any difference at all and understand how painful it is to force the cuda versions of those but felt like sharing in case it was not known.