Default Celery worker and beat commands not compatible with Celery 5.x

[copelco]

Celery options and command args are more strict in Celery 5.x. Relates to:

• celery worker command option -A is not working with version 5.0.0 celery/celery#6363

For example, Celery OPTIONS cannot be supplied for command ARGS:

celery [OPTIONS] COMMAND [ARGS]

An error like this will be displayed:

❯ kubectl -n test logs celery-beat-0    
Usage: celery beat [OPTIONS]
Try 'celery beat --help' for help.

Error: No such option: --workdir

These defaults must be updated to move --workdir before command:

ansible-role-django-k8s/defaults/main.yml

Lines 153 to 166 in 4f37830

	k8s_worker_command:
	- celery
	- --app={{ k8s_worker_celery_app }}
	- worker
	- --workdir=/code
	- --loglevel=info
	k8s_worker_beat_command:
	- celery
	- --app={{ k8s_worker_celery_app }}
	- beat
	- --workdir=/code
	- --loglevel=info
	- --pidfile=/data/beat.pid
	- --schedule=/data/schedulefile.db

This applies to project-specific overrides too. For example, --queues and --hostname must appear after worker.