datetime does not support timestamps after 2038 on 32-bit

Bug report

cpython on 32-bit platforms cannot handle dates beyond 2038-01-19

python3.10 -c 'import datetime; datetime.datetime.fromtimestamp(3000000000)'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
OverflowError: timestamp out of range for platform time_t

Your environment

• CPython versions tested on: 3.8, 3.9, 3.10
• Operating system and architecture: openSUSE-Tumbleweed 20230110 i586

This comes from
https://github.com/python/cpython/blob/8e9d08b0/Modules/_datetimemodule.c#L4982
https://github.com/python/cpython/blob/8e9d08b0/Python/pytime.c#L173

These could use __time64_t if available or we compile everything with __TIMESIZE=64

Inizia leggendo la gestione dei timestamp in Modules/_datetimemodule.c intorno alla riga 4982 e in Python/pytime.c intorno alla riga 173, tenendo presente l'ambiente openSUSE a 32 bit indicato. Stabilisci in che modo l'implementazione può usare il supporto per il tempo a 64 bit quando disponibile, quindi verifica che datetime.fromtimestamp(3000000000) abbia esito positivo sulle piattaforme a 32 bit senza l'overflow segnalato.