Track removing internal ClientOptions XML-doc parity in C# generator

[live1206]

The C# generator currently keeps XML docs on internal generated ClientOptions when no custom code view exists to preserve generated source parity. Once generated source baselines no longer depend on those internal ClientOptions XML docs, remove the compatibility override in ClientOptionsProvider.ShouldWriteTypeXmlDocs.

[github-actions]

🎯 Issue Triage

This is a technical debt tracking issue for the C# generator: once generated source baselines no longer rely on internal ClientOptions XML docs, the compatibility override in ClientOptionsProvider.ShouldWriteTypeXmlDocs should be removed.

Category: Feature (cleanup/tech debt)
Area: emitter:client:csharp

🔍 Analysis

• The C# generator currently preserves XML docs on internal generated ClientOptions classes as a parity measure when no custom code view exists.
• The cleanup is blocked on updating generated source baselines to no longer depend on these XML docs.
• Affected component: ClientOptionsProvider.ShouldWriteTypeXmlDocs in the C# HTTP client emitter (@typespec/http-client-csharp).
• No reproduction needed — this is an intentional tracking issue for a planned removal.

📝 Suggested next steps

• Update generated source baselines so they no longer depend on internal ClientOptions XML docs.
• Remove the compatibility override in ClientOptionsProvider.ShouldWriteTypeXmlDocs.
• Verify no regressions in generated output after the removal.

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