Get rid of unecessary phpstan prefix in some annotations

[yann-eugone]

At some point of history, IDEs were late on some advanced typing notations
We used to write some instruction for phpstan only
Now IDE understand phpstan almost perfectly
We can remove the phpstan prefix from most annotations

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.72%. Comparing base (e015262) to head (4206722).
Report is 16 commits behind head on 0.x.

Additional details and impacted files

@@            Coverage Diff            @@
##                0.x     #135   +/-   ##
=========================================
  Coverage     99.72%   99.72%           
  Complexity      909      909           
=========================================
  Files           147      147           
  Lines          2892     2892           
=========================================
  Hits           2884     2884           
  Misses            8        8           

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[yann-eugone]

This needs to be merged and has no runtime effect, review can be added afterwards