chore: Set track_progress=True by default

[matthewfeickert]

In the notebooks set track_progress=True so that when users run interactively or locally they get information on pseudo-experiments. However, to avoid having huge JupyterBook output (track_progress=True shows iterative updates of the progress bar in the JupyterBook output) have the CI switch this to track_progress=False during the build.

* Set `track_progress=True` for notebook files to give interactive users
  progress information.
* Set `track_progess=False` during the JupyterBook build in CI to avoid having
  the updates of the progress bar information frozen into the built book.
   - Use `git config --global --add safe.directory` to guard against GitHub Actions
     environment erroring with 'fatal: detected dubious ownership in repository'.

[matthewfeickert]

Note that this doesn't do anything for the Makefile so that might not be ideal.

[matthewfeickert]

I asked about this in https://github.com/orgs/executablebooks/discussions/1067.

[matthewfeickert]

This is the build view from CI