Add list and detail serializer to bed module

[GeekGawd]

Proposed Changes

• Add list and detail serializer to the bed module and remove the references of BedSerializer and ConsulationBedSerializer
• Add tests for the changes
• Add comment to remove BedSerializer and ConsultationBedSerializer when epic issue is resolved

Associated Issue

• Fixes bed.py in https://github.com/coronasafe/care_fe/issues/5492

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

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