feat(policies): add weak encryption policy

[elsapet]

Description

An extension to #215

Give policy failure with low severity if we detect a weak encryption library being used for a data type that it not a password

Example

Code

cipher = OpenSSL::Cipher.new('aes-128-cbc')
dsa_encrypt = OpenSSL::PKey::DSA.new(2048)
dsa_encrypt.export(cipher, customer.first_name)

Policy report

Checklist

• I've added test coverage that shows my fix or feature works as expected.
• I've updated or added documentation if required.
• I've included usage information in the description if CLI behavior was updated or added.
• PR title follows Conventional Commits format

[swarmia]

✅  Linked to AMA-3355 · Insecure encryption library used (no password detected)
➡️  Part of AMA-3280 · Write ALL Ruby custom detectors & policies
➡️  Part of AMA-2947 · OSS - Curio CLI