Eliminate Native AOT warnings from MSBuild-backed CLI commands

[Copilot]

MSBuild-backed Native AOT commands pulled unused Newtonsoft.Json APIs into the trim closure, producing IL2026 and IL3050 diagnostics.

• Constrain the AOT dependency closure

  • Disable Newtonsoft.Json LINQ-to-JSON serialization, component-model, and dynamic features.
  • Mark each switch as trimmable so ILC removes the associated reflection, expression-tree, and dynamic-binder paths.

• Prevent regressions

  • Extend the existing AOT feature-switch test to verify these APIs remain disabled alongside NuGet’s System.Text.Json path.

<RuntimeHostConfigurationOption
    Include="Newtonsoft.Json.Linq.JToken.DynamicIsSupported"
    Value="false"
    Trim="true" />

• Fixes Eliminate Native AOT warnings from MSBuild-backed CLI commands #55501

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