fix: DH-21658: Fix grid rendering hidden columns

[dgodinez-dh]

Two performance optimizations:

• grid renderer should not iterate over hidden columns
• metrics should not recalculate the width of a hidden column

[codecov]

Codecov Report

❌ Patch coverage is 59.09091% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.77%. Comparing base (c46fbaf) to head (7f20758).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/grid/src/GridMetricCalculator.ts	40.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2626      +/-   ##
==========================================
- Coverage   49.78%   49.77%   -0.02%     
==========================================
  Files         774      774              
  Lines       43767    43781      +14     
  Branches    11256    11079     -177     
==========================================
+ Hits        21789    21791       +2     
- Misses      21960    21972      +12     
  Partials       18       18              

Flag	Coverage Δ
unit	49.77% <59.09%> (-0.02%)	⬇️

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[mattrunyon]

Is there possibly a better way to handle this? It just feels gross to have visible and nonHidden in the same thing because they're pretty much the same thing. I know visible really means "in the viewport" though

Also just creates a blurry line of which metric should I use

[dgodinez-dh]

Any suggestions. It seems to me that we need both metrics. I did a version of this where a filtered visibileColumns in the renderer, but it seemed like a better optimization to calculate it ahead of time (especially since it is easy to add to the existing lopp).

[dgodinez-dh]

I renamed this metric and changed the comment for more clarity.

[mattrunyon]

Looks good. Just a few small comments to update