Add admin access override to countByState checks in projects and devices models

[cstns]

Description

fixes dashboard counters when admins visit team dashboards they are not a member of

Related Issue(s)

closes #6472

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.42%. Comparing base (6fcab5c) to head (8074e77).
⚠️ Report is 21 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6500   +/-   ##
=======================================
  Coverage   76.42%   76.42%           
=======================================
  Files         396      396           
  Lines       19887    19888    +1     
  Branches     4768     4769    +1     
=======================================
+ Hits        15199    15200    +1     
  Misses       4688     4688           

Flag	Coverage Δ
backend	76.42% <100.00%> (+<0.01%)	⬆️

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