Switching to MongoDB-based driver for companion notebook for reading data

I.e., https://ac-microcourses.readthedocs.io/en/latest/courses/hello-world/1.5-data-logging.html linking to https://ac-microcourses.readthedocs.io/en/latest/courses/hello-world/1.5.1-pymongo.html instead of https://ac-microcourses.readthedocs.io/en/latest/courses/hello-world/1.5.1-aws-lambda-read.html and then we can make a note in 1.5.1-pymongo.html pointing to 1.5.1-aws-lambda-read.html as the mirrored method. Essentially, I think it would make more sense for people to use PyMongo directly within orchestrators, which are running full Python environments. Though, this would need to be updated in 1.5 and 1.6 assignments again. This came to mind again when Yanghuang [mentioned](https://github.com/AccelerationConsortium/ac-training-lab/issues/130#issuecomment-2573594011) he was going to use Lambda AWS for the orchestrator database integration. @SissiFeng thoughts?