Use new NegotiateAuthentication API instead of reflection of internal API (#42364)

...tication/Negotiate/src/Internal/INegotiateStateFactory.cs

...y/Authentication/Negotiate/src/Internal/NegotiateState.cs

...ntication/Negotiate/src/Internal/NegotiateStateFactory.cs

...ication/Negotiate/src/Internal/ReflectedNegotiateState.cs

...tion/Negotiate/src/Internal/SecurityStatusPalErrorCode.cs

...urity/Authentication/Negotiate/src/NegotiateExtensions.cs

...Security/Authentication/Negotiate/src/NegotiateHandler.cs

...Security/Authentication/Negotiate/src/NegotiateOptions.cs