fix: Make requests with no identity work with "*" target

[shahzadlone]

Relevant issue(s)

Resolves #3276

Description

• Fix the bug where a request without an identity still wouldn't be able to access a document even if there was a "*" relationship

Tasks

• I made sure the code is well commented, particularly hard-to-understand areas.
• I made sure the repository-held documentation is changed accordingly.
• I made sure the pull request title adheres to the conventional commit style (the subset used in the project can be found in tools/configs/chglog/config.yml).
• I made sure to discuss its limitations such as threats to validity, vulnerability to mistake and misuse, robustness to invalidation of assumptions, resource requirements, ...

How has this been tested?

• Added tests

Specify the platform(s) on which this was tested:

• WSL2 (Manjaro)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.07%. Comparing base (89f9f41) to head (6a7d5b9).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3278      +/-   ##
===========================================
+ Coverage    77.97%   78.07%   +0.11%     
===========================================
  Files          382      382              
  Lines        35383    35390       +7     
===========================================
+ Hits         27587    27630      +43     
+ Misses        6149     6123      -26     
+ Partials      1647     1637      -10     

Flag	Coverage Δ
all-tests	78.07% <100.00%> (+0.11%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
internal/db/permission/check.go	86.05% <100.00%> (+2.71%)	⬆️

... and 18 files with indirect coverage changes

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[fredcarle]

LGTM. Just one minor suggestion to clarify comment in the integration test.