Add SetErrorMode to msvcrt module (#10842)

Author: sobolevn

stdlib/msvcrt.pyi

@@ -27,5 +27,6 @@ if sys.platform == "win32":
     def ungetch(__char: bytes | bytearray) -> None: ...
     def ungetwch(__unicode_char: str) -> None: ...
     def heapmin() -> None: ...
+    def SetErrorMode(__mode: int) -> int: ...
     if sys.version_info >= (3, 10):
         def GetErrorMode() -> int: ...  # undocumented

tests/stubtest_allowlists/win32.txt

@@ -10,7 +10,6 @@ _winapi.CreateFileMapping
 _winapi.MapViewOfFile
 _winapi.OpenFileMapping
 _winapi.VirtualQuerySize
-msvcrt.SetErrorMode
 ssl.SSLSocket.recvmsg
 ssl.SSLSocket.recvmsg_into
 ssl.SSLSocket.sendmsg