scripts/ansible: 'pip install --prefer-binary ansible-core' is simpler/faster & more future-proof

[holta]

More future-proof solution than even:

• PR scripts/ansible: Install cryptography==41.0.3 if dpkg 32-bit arch armhf (interim patch til https://piwheels.org/simple offers better 'cp39' coverage?) #3651

Huge thanks to those who provided essential, breakthrough tips here:

• ansible-core does not install on FULLY 32-bit Raspberry Pi OS Bullseye — attempts cryptography 41.0.4 and 41.0.3 — "ERROR: Failed building wheel for cffi" #3650

Tangentially related:

• 2 bits of bad news just for the record [cryptography, piwheels, rust, Ansible] #3547
• PR scripts/ansible: python3-cryptography for 32-bit i386 e.g. i686 #3615
• PR Brute Force 'apt install ansible-core' (e.g. 2.14.3 on Debian Bookworm) on 32-bit legacy i386, to avoid rust/wheels/cryptography compiling mess #3617
• PR scripts/ansible: Evaluate upstream piwheels / cryptography fix on "32-bit" RasPiOS 12 Lite [pinning to cryptography 40.0.1 no longer nec!] [create /etc/pip.conf missing from RasPiOS as nec, to avoid cffi glitch] #3632

[holta]

Re-tested with another smoke test on fully 32-bit RasPiOS 11 (Bullseye), just as another reconfirmation of these manual steps:

• ansible-core does not install on FULLY 32-bit Raspberry Pi OS Bullseye — attempts cryptography 41.0.4 and 41.0.3 — "ERROR: Failed building wheel for cffi" #3650 (comment)