Flushed care_static_data prefixed redis keys

[JohnLu2004]

• Used delete_pattern from django-redis repo to delete keys

Proposed Changes

• Deletes redis keys with care_static_data prefix

Associated Issue

• Fixed Flush Redis before loading static data #2249, Used Cache(from django) which has a delete_pattern() function to delete keys with prefix care_static_data within try/catch blocks to prevent uncaught exceptions.

Merge Checklist

• Linting Complete
• Any other necessary step

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

@ohcnetwork/care-backend-maintainers @ohcnetwork/care-backend-admins

[sainak]

reference delete_pattern from cache backend

https://github.com/jazzband/django-redis/blob/master/README.rst#scan--delete-keys-in-bulk

use itersize=25_000, to speed up the operation

[JohnLu2004]

All the requested changes should be in place now 👍

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.

Project coverage is 69.19%. Comparing base (67c63d9) to head (0858f68).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
care/facility/tasks/redis_index.py	0.00%	8 Missing ⚠️
...e/facility/management/commands/load_redis_index.py	0.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2572      +/-   ##
===========================================
- Coverage    69.26%   69.19%   -0.07%     
===========================================
  Files          211      211              
  Lines        11928    11940      +12     
  Branches      1208     1208              
===========================================
  Hits          8262     8262              
- Misses        3290     3302      +12     
  Partials       376      376              

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[vigneshhari]

If the data load fails, we will end up with no data in the system, this is a flaw. An ideal implementation would only delete stale items maintaining the existing data somehow.
We will ignore this flaw for now because we are redesigning the coding system entirely.