<__msvc_threads_core.hpp>: Revert alignas changes that broke mutex and condition_variable for /clr - #6188

<__msvc_threads_core.hpp>: Revert alignas changes that broke mutex and condition_variable for /clr#6188

Stephan T. Lavavej (StephanTLavavej) merged 2 commits into

microsoft:mainmicrosoft/STL:mainfrom

StephanTLavavej:clr-mutexStephanTLavavej/STL:clr-mutexCopy head branch name to clipboard