Python 3.12 upgrade

[UsamaSadiq]

Description

• Updated GitHub CI and tox to run checks with Python 3.12 env only
• Updated requirements with Python 3.12 env
• Updated Dockerfile to build with Python 3.12.
• Dropped support for Python<3.12

Testing

• Tested the docker build locally using make_build with updated Dockerfile to be successful.
• CI checks with Python 3.12 are green.

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
designer/apps/api/v1
test_pages_api.py
views.py
designer/apps/core
models.py
signals.py
views.py
designer/apps/core/management/commands
create_program.py
designer/apps/core/management/commands/tests
test_create_program.py
designer/apps/core/tests
test_context_processors.py
test_views.py
designer/apps/pages
models.py
Project Total

This report was generated by python-coverage-comment-action