Remove dependency on torchdata for torch nightly installation

[arnavgarg1]

Our CI is currently failing with torch nightly: https://github.com/ludwig-ai/ludwig/actions/runs/7098011269/job/19319143677

Based on a discussion with the Torch team, this is related to failed builds over the last two days (https://hud.pytorch.org/hud/pytorch/data/nightly/1?per_page=50), 12-04-2023 and 12-05-2023.

The issue stems from a dependency mismatch between torchtext and torchdata.

The torch team has a PR in the pipeline to resolve this issue: pytorch/text#2218. However, it looks like it's currently failing so we will have to wait for this to land.

In the interim, I've added a temporary workaround that installs the latest stable version of torchdata first and then installs torchtext nightly. This seems to work just fine. In the future, once pytorch/text#2218 lands, we will want to remove our explicit install of torchdata for torchnightly.