dialects: (builtin) apply normalization on ints, not IntAttrs

[jorendumoulin]

the current flow of creating dense attrs is the following:
parse -> int -> IntAttr -> normalize -> IntAttr -> int -> bytes

this PR changes the normalization to work on ints to get the following:
parse -> int -> normalize -> int -> bytes

which simplifies things somewhat and should improve performance significantly for larger arrays

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.47%. Comparing base (768eb79) to head (9ee44f7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3625      +/-   ##
==========================================
- Coverage   90.47%   90.47%   -0.01%     
==========================================
  Files         472      472              
  Lines       59248    59247       -1     
  Branches     5636     5636              
==========================================
- Hits        53606    53603       -3     
- Misses       4205     4206       +1     
- Partials     1437     1438       +1     

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[superlopuh]

Can you please assign yourself in PRs and add the appropriate label?

[jorendumoulin]

yes! sorry