ntdll: add WinSqmEndSession/WinSqmStartSession stubs

[Austin English]

For https://bugs.winehq.org/show_bug.cgi?id=31971

See https://github.com/Microsoft/PowerShell-DSC-for-Linux/blob/b68b016d3e0b042c8d754ca38fb471ae78c45bf9/LCM/dsc/engine/EngineHelper/EngineHelper.c#L868
for a Microsoft (MIT licensed) example of the API being used.

-- 
-Austin
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