Consider using ansible-core instead of ansible to reduce install size significantly

[ocervell]

Trying to include bbot in my Docker image, I noticed the primal size factor was the Ansible installation, a.k.a the ansible package:

I'm not sure we need all the ansible collections like fortinet etc... so maybe we can yank the overall size by yanking the collections we don't need.

I think we can switch to the ansible-core package.

Sure, 462MB is not that big but when you want a slim Docker image that can run in constrained environments like RPi, it can be...