Validate pdm.lock in github action

[pgarrison]

Issue

Developers of this repo must be diligent to ensure that the following always stay in sync:

• pyproject.toml
• pdm.lock
• requirements1.txt
• requirements2.txt

This cannot be easily automated because github actions runners don't have CUDA (necessary to build the environment), but pyproject.toml and pdm.lock can be automatically validated.

Testing

The check runs below. It should pass and show that it ran pdm lock --check in the job output

[ritvikvasan]

Thanks!!