Fix yamllint warning

yamllint .                                                                                                                                                                          (main|💩?) 15:17
./tasks/generate_ca_cert.yml
  8:161     warning  line too long (295 > 160 characters)  (line-length)

./tasks/generate_client_cert.yml
  29:161    warning  line too long (316 > 160 characters)  (line-length)

./tasks/generate_server_cert.yml
  34:161    warning  line too long (335 > 160 characters)  (line-length)

Hint

running ansible-lint . will output same warning but with suggestion on how to fix

The root cause is the use of a command to call the openssl CLI.

The correct solution is to instead use Ansible modules from the community.crypto namespace