[NTUSER][USER32] Populate dwExpWinVer (#7095)

This value is needed for
SetWindowPlacement and IMM.
JIRA issue: CORE-19675
JIRA issue: CORE-19268
- Add RtlGetExpWinVer function
into win32ss/us

[NTUSER][USER32] Populate dwExpWinVer (#7095)

This value is needed for
SetWindowPlacement and IMM.
JIRA issue: CORE-19675
JIRA issue: CORE-19268
- Add RtlGetExpWinVer function
into win32ss/user/rtl/image.c.
- Add RtlGetExpWinVer prototype
into win32ss/include/ntuser.h.
- Delete RtlGetExpWinVer
definition in
win32ss/user/user32/windows/window.c.
- Populate THREADINFO.dwExpWinVer
and CLIENTINFO.dwExpWinVer
by using RtlGetExpWinVer in
InitThreadCallback function.

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