Fix lunar lander dependency issues

[btjanaka]

Description

We have been running into some issues with lunar lander not running properly on Colab due to dependency issues. We also had some dependency issues with swig (see #366).

Regarding swig, I found that it was difficult to get the examples to work properly with swig because we were not using a virtual environment, so the different Python versions were being confused -- hence we would get errors like "Module not found" when trying to use swig. To remedy this problem, I have started #367 to run all PR jobs in a Conda env. This PR uses a Conda env only for the examples job.

TODO

• Upgrade to gymnasium 0.29.1 due to Jax-jumpy issues -> gymnasium 0.27.0 depended on jax-jumpy, which resulted in installation errors because jax-jumpy was not fully production-ready
• Fix ordering of Dask imports
• Re-run tutorial on Colab to get times; update tutorial times accordingly
• Run on Colab and fix deprecation warnings -> looks like there were no warnings
• Try running locally in Python 3.10 -> Colab CPU seems really slow compared to local CPU, but this makes sense
• Fix deps in lunar lander example
• Make example.sh script run multiple pip install commands

Questions

Status

• I have read the guidelines in
  CONTRIBUTING.md
• I have formatted my code using yapf
• I have tested my code by running pytest
• I have linted my code with pylint
• I have added a one-line description of my change to the changelog in
  HISTORY.md
• This PR is ready to go