Added actively dying patient category

[shivankacker]

Proposed Changes

• Adds an "Actively Dying" patient category.

Associated Issue

• Patient categorisation- add definitions care_fe#7962

Merge Checklist

• Tests added/fixed
• Update docs in /docs
• Linting Complete
• Any other necessary step

Only PR's with test cases included and passing lint and test pipelines will be reviewed

@coronasafe/care-backend-maintainers @coronasafe/care-backend-admins

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.20%. Comparing base (c1a74f2) to head (15be345).
Report is 12 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2298      +/-   ##
===========================================
+ Coverage    63.82%   64.20%   +0.37%     
===========================================
  Files          239      241       +2     
  Lines        13416    13582     +166     
  Branches      1909     1940      +31     
===========================================
+ Hits          8563     8720     +157     
+ Misses        4505     4502       -3     
- Partials       348      360      +12     

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[nihal467]

LGTM

[vigneshhari]

We don't need a reverse migration in cases like these.