MSVC: enable Two-phase name lookup

Previously disabled due to OpenMP issues but those have been resolved
on the compilers that are currently our lower bar. (vs2019)

Pull Request: https://projects.blender.org/blender/blender/pulls/110660

build_files/cmake/platform/platform_win32.cmake

@@ -186,8 +186,6 @@ endif()
 # C++ standards conformace (/permissive-) is available on msvc 15.5 (1912) and up
 if(NOT MSVC_CLANG)
   string(APPEND CMAKE_CXX_FLAGS " /permissive-")
-  # Two-phase name lookup does not place nicely with OpenMP yet, so disable for now
-  string(APPEND CMAKE_CXX_FLAGS " /Zc:twoPhase-")
 endif()
 
 if(WITH_WINDOWS_SCCACHE AND CMAKE_VS_MSBUILD_COMMAND)