Python 3.11

[jarosenb]

Overview:

Bumps Python version to 3.7 and updates Python dependencies.

PR Status:

• Ready.
• Work in Progress.
• Hold.

Summary of Changes:

• Change Portal python image tag from 3.7-buster to 3.11-buster.
• Vendor the attrdict library and update its use of the Collections library to allow agavepy to be imported.
• Switch the cache backend from python-memcached to pylibmc for forward compatibility. The python-memcached backend is deprecated in Django 3.
• Update additional libraries for Python 3.11 compatibility.

Testing Steps:

1. Run docker-compose -f conf/docker/docker-compose.yml build and test all portal features.

UI Photos:

Notes:

[jarosenb]

3.11 will be rolled into the django3/postgres upgrades.