Update DisplayList expectations after canonicalization

[Kyle-Ye]

Summary

• Update variadic view DisplayList expectations to match canonicalized effect nesting.
• Match view-alias output as direct color items after redundant effects are removed.
• Remove the obsolete effect-wrapped color helper.

Root Cause

DisplayList canonicalization removes redundant effect nodes, while these tests still matched the pre-canonicalized structure. This caused seven assertion failures even though the rendered colors were correct.

Validation

• ViewAliasTests and VariadicViewTests: 7 tests passed with Swift 6.3.3 / Xcode 26.6.

[tuist]

🛠️ Tuist Run Report 🛠️

Tests 🧪

Scheme	Status	Cache hit rate	Tests	Skipped	Ran	Commit
OpenSwiftUI	✅	0 %	82	0	82	e953587fd

Builds 🔨

Scheme	Status	Duration	Commit
OpenSwiftUI	✅	1m 36s	e953587fd

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 26.25%. Comparing base (593f544) to head (aae91ad).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #996       +/-   ##
===========================================
+ Coverage   14.29%   26.25%   +11.95%     
===========================================
  Files         691      734       +43     
  Lines       48857    55580     +6723     
===========================================
+ Hits         6983    14590     +7607     
+ Misses      41874    40990      -884     

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