Check that HttpSys and IIS TLS support isn't impacted by obsolete members on ITlsHandshakeFeature

[JamesNK]

Is there an existing issue for this?

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Describe the bug

Runtime obsoleted various properties and types used on SslStream: dotnet/runtime#100361. These properties are exposed in ASP.NET Core with ITlsHandshakeFeature. We have also made the properties obsolete in #59389. This was done as part of build ops and unstuck the build.

More time should be spent looking at this. An expert in HttpSys and IIS should investigate that TLS functionality isn't negatively impacted by obsoleting the properties.

One possible change is populating the NegotiatedCipherSuite property. HttpSys and IIS don't appear to set the new recommended property on the feature.

Expected Behavior

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Steps To Reproduce

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Exceptions (if any)

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.NET Version

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Anything else?

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