chore(cleanup): unused and deprecated examples

[Jose-Matsuda]

closes https://github.com/StatCan/aaw-private/issues/74

Reasoning for each delete can be found in this comment.

The following examples may need some TLC though;

• archive/mlflow (as this references minio)
• pytorch (update a package installed)
• querySql (uses minio)
• self-serve-storage (uses minio)
• statscan_data/ViaPython.ipynb (update the package install reference to the main channel

And as a result of some of the deletions we may want some new examples including but not limited to;

• Using argo workflows
• .... Extra brainstorming / main issue for new examples is here