imaplib.Time2Internaldate also takes datetimes and 9-element tuples (#8630)

Co-authored-by: Alex Waygood <[email protected]>

Author: jheiss

stdlib/imaplib.pyi

@@ -4,6 +4,7 @@ import time
 from _typeshed import Self
 from builtins import list as _list  # conflicts with a method named "list"
 from collections.abc import Callable
+from datetime import datetime
 from re import Pattern
 from socket import socket as _socket
 from ssl import SSLContext, SSLSocket
@@ -159,4 +160,4 @@ class _Authenticator:
 def Internaldate2tuple(resp: bytes) -> time.struct_time: ...
 def Int2AP(num: int) -> str: ...
 def ParseFlags(resp: bytes) -> tuple[bytes, ...]: ...
-def Time2Internaldate(date_time: float | time.struct_time | str) -> str: ...
+def Time2Internaldate(date_time: float | time.struct_time | time._TimeTuple | datetime | str) -> str: ...