[Bug] Attachment permissions

[SchrodingersGat]

• Fixes a bug where attachments cannot be deleted via the API, due to incorrect permission checks.
• Re-enable bulk delete of attachments
• Validation for attachment bulk delete

[netlify]

✅ Deploy Preview for inventree-web-pui-preview canceled.

Name	Link
🔨 Latest commit	b556d65
🔍 Latest deploy log	https://app.netlify.com/sites/inventree-web-pui-preview/deploys/66bae7d95c48bd00085458bf

[codecov]

Codecov Report

Attention: Patch coverage is 74.19355% with 8 lines in your changes missing coverage. Please review.

Project coverage is 83.39%. Comparing base (e6873d2) to head (b556d65).
Report is 324 commits behind head on master.

Files with missing lines	Patch %	Lines
src/backend/InvenTree/common/api.py	30.00%	7 Missing ⚠️
src/backend/InvenTree/common/serializers.py	90.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7863   +/-   ##
=======================================
  Coverage   83.39%   83.39%           
=======================================
  Files        1128     1128           
  Lines       50233    50259   +26     
  Branches     1728     1728           
=======================================
+ Hits        41893    41916   +23     
- Misses       7905     7910    +5     
+ Partials      435      433    -2     

Flag	Coverage Δ
backend	85.22% <74.19%> (-0.01%)	⬇️

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[github-actions]

💔 All backports failed

Status	Branch	Result
❌	0.16.x	Backport failed because of merge conflicts You might need to backport the following PRs to 0.16.x: - Metadata api fix (#7829)

Manual backport

To create the backport manually run:

backport --pr 7863

Questions ?

Please refer to the Backport tool documentation and see the Github Action logs for details