refactor: Cherry-pick #2583 Decouple IrisGrid from Dh.Sort, use SortDescriptor instead

[vbabich]

• Decouple IrisGrid from Dh.Sort, delegate sort hydration to model to allow plugins use own sort API
• Allow negative column indexes in IrisGrid, so plugins could sort and filter on non-columns, such as ColumnBy sources

[codecov]

Codecov Report

❌ Patch coverage is 82.35294% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.44%. Comparing base (a467feb) to head (b9dc108).

Files with missing lines	Patch %	Lines
packages/iris-grid/src/IrisGridUtils.ts	82.60%	4 Missing ⚠️
packages/iris-grid/src/IrisGrid.tsx	33.33%	2 Missing ⚠️
packages/iris-grid/src/IrisGridTestUtils.ts	60.00%	2 Missing ⚠️
packages/iris-grid/src/IrisGridRenderer.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           release/v0.85    #2580      +/-   ##
=================================================
- Coverage          48.45%   48.44%   -0.01%     
=================================================
  Files                712      712              
  Lines              39736    39747      +11     
  Branches            9920     9921       +1     
=================================================
+ Hits               19253    19255       +2     
- Misses             20470    20479       +9     
  Partials              13       13              

Flag	Coverage Δ
unit	48.44% <82.35%> (-0.01%)	⬇️

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