[3.11] [3.12] gh-96747: Mention the PyPI `passlib` package in the `crypt` deprecation doc (GH-106660) (GH-106660) (#106697)

[3.12] gh-96747: Mention the PyPI `passlib` package in the `crypt` deprecation doc (GH-106660) (GH-106660)

* Added mention to passlib package as alternative to the deprecated crypt module.
(cherry picked from commit ec7b05a0bebb2cc2ec42bf00cde2b66145880459)

Co-authored-by: Yonatan Bitton <bityob@gmail.com>