fix: add missing promotiontask permissions to project admin role

[badstreff]

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Issue Reference

N/A

Description

Add missing PromotionTask permissions to the project admin role

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• The PR is linked to an existing issue.
• The linked issue has no blocking labels (kind/proposal,
  needs discussion, needs research, maintainer only, area/security,
  size/large, size/x-large, size/xx-large).
• I have added or updated tests as appropriate.
• I have added or updated documentation as appropriate.

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[krancour]

Nice find. Nice fix. Thank you.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.10%. Comparing base (3841bd2) to head (f7827c6).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6335   +/-   ##
=======================================
  Coverage   58.10%   58.10%           
=======================================
  Files         499      499           
  Lines       41807    41807           
=======================================
  Hits        24292    24292           
  Misses      16054    16054           
  Partials     1461     1461           

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[akuitybot]

Successfully created backport PR for release-1.10:

• chore(backport release-1.10): fix: add missing promotiontask permissions to project admin role #6367