Bump torch-harmonics to 0.8.0 and update constraint on imageio

[spencerkclark]

This PR ports the changes made in ai2cm/full-model#2286 to our public repository.

Changes:

• Bumps the version of torch-harmonics to 0.8.0.
• Constrains the version of imageio to be greater than or equal to 2.28.1. Per chore: update imagio.save to use duration argument when creating a gif wandb/wandb#9887 and an additional fix, this means videos logged to WandB will be displayed properly again.
• Modifies code in sht_fix.py to account for the fact that quadrature functions in torch-harmonics return torch.tensor objects instead of NumPy arrays as of version 0.7.6 (Tkurth/torchification NVIDIA/torch-harmonics#66).
• Converts video data from single-channel grayscale to three-channel RGB to work around an imageio error, and explicitly specifies the video format as "gif" to silence a warning. Relevant wandb and imageio issues and PRs:
  • v3.imwrite to grayscale PNG of image with shape HWC does not work imageio/imageio#904
  • chore: update video documentation wandb/wandb#9790

Resolves #48