Add CompareResult extension trait for Instruction

[Robbepop]

This allows to share more code between main and #1512.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.22%. Comparing base (e1cf22b) to head (6442903).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1537   +/-   ##
=======================================
  Coverage   72.22%   72.22%           
=======================================
  Files         179      179           
  Lines       16410    16414    +4     
=======================================
+ Hits        11852    11855    +3     
- Misses       4558     4559    +1     

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