[WIP] update celery and related pkgs

[pkfec]

Summary

1. Update Celery and its dependant packages to the most stable versions.
2. Test celery memory/performance has an improvements
3. Test scheduled tasks run OK with the latest pkg upgrades

• Related Investigate high celery-worker memory #4864

[pkfec]

When ready to upgrade celery: This WIP PR has the most stable celery and its dependant comptable pkgs.
Celery v5.1.0 come with few breaking changes :

1. Start celery see - https://docs.celeryproject.org/en/stable/userguide/periodic-tasks.html#starting-the-scheduler

Celery v4	Celery v5
celery beat --app webservices.tasks --loglevel INFO	celery -A webservices.tasks beat --loglevel INFO
celery worker --app webservices.tasks --loglevel INFO	celery -A webservices.tasks worker --loglevel INFO

2. Type of connection pool(gevent, greenlet, solo, prefork etc...) MUST be specified during worker startup : https://www.distributedpython.com/2018/10/26/celery-execution-pool/#:~:text=The%20difference%20is%20that%20%E2%80%93pool,the%20eventlet%20Greenlet%20pool%20(eventlet.