fix: DH-17861: Fix the warning about IrisGridModelUpdater render not being a pure function

[vbabich]

pendingRowCount and pendingDataMap setters in IrisGridModelUpdater were emitting an event in the render cycle, that caused a React warning about the render not being a pure function because the event triggered state update in IrisGrid.
Wrap the setters in useEffect instead of useOnChange so the events are emitted after the render.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.41%. Comparing base (ec9b41e) to head (4570bd4).
Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2249      +/-   ##
==========================================
- Coverage   46.61%   46.41%   -0.20%     
==========================================
  Files         692      698       +6     
  Lines       38508    38767     +259     
  Branches     9826     9866      +40     
==========================================
+ Hits        17949    17993      +44     
- Misses      20506    20720     +214     
- Partials       53       54       +1     

Flag	Coverage Δ
unit	46.41% <100.00%> (-0.20%)	⬇️

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