Why these changes are being introduced:
Update the testing functions to address the three different input json
files (standard cdn, future-of-libraries custom domain, grandchallenges
custom domain). Fix a typo in the Makefile

How this addresses that need:
* Clean up the json fixtures to match what's happening in the CDN
* Add testing functions for the standard CDN and the Grand Challenges
site
* Clean up the testing function for Future of Libraries site

Side effects of this change:
None.

Why these changes are being introduced:
With the updates to mitlib-tf-workloads-libraries-website, Terraform
and the AWS Provider now support Python 3.11 for Lambda and Lambda@Edge.

How this addresses that need:
* Update the Python version to 3.11

Side effects of this change:
None.

Relevant ticket(s):
* https://mitlibraries.atlassian.net/browse/GDT-106

Why these changes are being introduced:
This turns on the automated trigger (on.push) for merge to `main`.

How this addresses that need:
* Uncomment the `on.push` workflow trigger for the deploy to Stage

Side effects of this change:
Merge to `main` will now automatically trigger deploys to
Stage-Workloads