Use @functools.cache instead of @functools.lru_cache(maxsize=None)

[Hugo van Kemenade]

functools.cache was added in Python 3.9 and returns the same as functools.lru_cache(maxsize=None)

​https://docs.python.org/3/library/functools.html#functools.cache

Now Python 3.10 is the lowest supported version for Django 5.0, let's use the shorter one.

​https://docs.djangoproject.com/en/dev/faq/install/#what-python-version-can-i-use-with-django

[Mariusz Felisiak]

Duplicate of #34233.

[Hugo van Kemenade]

PR ​https://github.com/django/django/pull/16482 is a duplicate of ​https://github.com/django/django/pull/16480, so closing this ticket as a duplicate of https://code.djangoproject.com/ticket/34233.