added test cases for asset bed

[praffq]

Proposed Changes

• Added test cases for asset bed module
• Adding more test for bed create module
• Updated PermissionError with PermissionDenied for better handling of permission errors

Associated Issue

• Fixes #1386
• Part of #1372

Merge Checklist

• [x] Tests added/fixed
• [x] Linting Complete

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

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

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 69.27%. Comparing base (39c7aa4) to head (53c6e20). Report is 7 commits behind head on develop.

Files with missing lines	Patch %	Lines
care/facility/api/serializers/asset.py	33.33%	2 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2532      +/-   ##
===========================================
+ Coverage    69.19%   69.27%   +0.08%     
===========================================
  Files          211      211              
  Lines        11940    11943       +3     
  Branches      1208     1208              
===========================================
+ Hits          8262     8274      +12     
+ Misses        3302     3297       -5     
+ Partials       376      372       -4     

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