Migrate to mockery v3

[tsaarni]

Testing migration from mockery v2 to v3

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.38%. Comparing base (4d027c5) to head (27786a6).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7588      +/-   ##
==========================================
+ Coverage   82.35%   82.38%   +0.02%     
==========================================
  Files         130      130              
  Lines       15873    15873              
==========================================
+ Hits        13073    13077       +4     
+ Misses       2513     2510       -3     
+ Partials      287      286       -1     

see 1 file with indirect coverage changes

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