Update colab for new viewer

[ginazhouhuiwu]

Changes:

• deprecate old viewer elements in notebook
• use conda for colmap installation

TODO: Viser share link doesn't seem to be printing properly. ns-train cell sometimes stops executing after saving the configs.

[yimingc]

Thanks for trying fix this.

I got error when I ran in colab on your branch tip

[ginazhouhuiwu]

Hey! Thanks for letting me know the errors! Unfortunately I'm still working on debugging the training portion in this pr draft... But your error seems to point to a tinycudann installation error, which I can't recreate from my end. Can you let me know if that was properly installed from running the first cell in the notebook?

[AntonioMacaronio]

This is still an error - on line 14 inside the cell "Install Nerfstudio and Dependencies (~8 min)": !gdown "https://drive.google.com/u/0/uc?id=15WngFRNar_b8CaPR5R-hvQ3eAnlyk_SL&confirm=t"

tinycudann is able to be installed perfectly, but the drive link for the colmap package is not sharable (even with the confirm=t tag on the url for the large gdrive files). Perhaps that is why it is not reproducible?

I see in this PR there are new fixes with pip install condalab - i added this to mine but the training cell will still say "Col

I also just tried the fix noted here: https://github.com/nerfstudio-project/nerfstudio/issues/2406#issuecomment-1746746583 but I am still running into various versioning errors when running the following "Downloading and Processing Data" cell