python-cryptography: update to 48.0.0 + backport cross-include fix

python-cryptography: update to 48.0.0 + backport cross-include fix

Bump from 46.0.7 to the current 48.0.0 release. Notable upstream
changes since 46.0.7:

- 48.0.0 drops Python 3.8 support (requires 3.9+); raises
  Py_LIMITED_API floor to 0x030900f0.
- Adds ML-KEM / ML-DSA post-quantum primitives via OpenSSL 3.5.0+
  (in addition to existing AWS-LC / BoringSSL paths).
- BACKWARDS INCOMPATIBLE: stricter X.509 CRL signature-algorithm
  matching (mismatched inner/outer algs now raise ValueError at parse
  time).
- Drops 32-bit Windows wheels and ships macOS only on arm64.

Replace the old downstream cross-compile fix with a backport of the
upstream-merged version from pyca/cryptography PR #14904
(commit 5d072cb2a685, scheduled for the release after 48.0.0).

Release notes:
https://cryptography.io/en/latest/changelog/#v48-0-0

Fixes: https://github.com/openwrt/packages/issues/29521
Signed-off-by: Alexandru Ardelean <redacted>