Refactor AnyView init fromValue implementation

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 13.25%. Comparing base (2b39e17) to head (b3e8361).

Files	Patch %	Lines
.../OpenSwiftUI/Core/Runtime/ProtocolDescriptor.swift	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #73 +/- ## ========================================== - Coverage 13.34% 13.25% -0.10% ========================================== Files 185 185 Lines 4383 4360 -23 ========================================== - Hits 585 578 -7 + Misses 3798 3782 -16 ```

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