[chore] Use errors.Join to unify errors

[MrAlias]

Resolve #3544

Replace all custom implementations for multi-error unification with the errors.Join function of the standard library.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.5%. Comparing base (1a964cc) to head (635ee88).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #5907     +/-   ##
=======================================
- Coverage   84.6%   84.5%   -0.1%     
=======================================
  Files        271     271             
  Lines      22855   22822     -33     
=======================================
- Hits       19338   19305     -33     
  Misses      3172    3172             
  Partials     345     345             

see 6 files with indirect coverage changes

[dashpole]

🙏