Replace ArrayList from CompositionAdorner with List<AttributeRange>

[h3xds1nz]

Description

Replaces ArrayList with List<AttributeRange> to increase type safety and promote strongly-typed code. Most of the perf benefits beyond t0 were now erased in post .NET 9 as the ArrayList methods are usually successfully de-abstracted but that doesn't really matter as its still a benefit to use a generic collection type instead e.g. to bypass cast checks.

Customer Impact

Cleaner codebase for developers.

Regression

No.

Testing

Local build.

Risk

Low, just a type swap on private collection.

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes missing coverage. Please review.

Project coverage is 11.25415%. Comparing base (6514196) to head (76a29bf).
Report is 11 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #10673         +/-   ##
===================================================
+ Coverage   11.22814%   11.25415%   +0.02600%     
===================================================
  Files           3352        3353          +1     
  Lines         668000      668056         +56     
  Branches       74980       74979          -1     
===================================================
+ Hits           75004       75184        +180     
+ Misses        591745      591624        -121     
+ Partials        1251        1248          -3     

Flag	Coverage Δ
Debug	11.25415% <0.00000%> (+0.02600%)	⬆️

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