Add Celery health check endpoint

[sudan45]

Addresses

• Add healthcheck for celery workers #1512

Feature:

• Introduced a health check endpoint (HealthCheckView) that allows clients to verify the status of the Celery worker.
• The endpoint responds with a "healthy" status when the worker is active and responsive, and "unhealthy" if not.

This PR doesn't introduce any:

• temporary files, auto-generated files or secret keys
• n+1 queries
• flake8 issues
• print
• typos
• unwanted comments

This PR contains valid:

• tests
• permission checks (tests here too)
• translations

[thenav56]

Let's explore this https://github.com/revsys/django-health-check
It already has ping function https://github.com/revsys/django-health-check/blob/master/health_check/contrib/celery_ping/backends.py

[susilnem]

Minor change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.74%. Comparing base (4d7ee5d) to head (c4605f7).
Report is 11 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1536      +/-   ##
===========================================
+ Coverage    79.63%   79.74%   +0.11%     
===========================================
  Files          464      464              
  Lines        30076    30136      +60     
  Branches      3379     3384       +5     
===========================================
+ Hits         23952    24033      +81     
+ Misses        6124     6103      -21     

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[susilnem]

LGTM!