Upgrade Ansible to 2.9 in DevOps repo

[nathanhruby]

New version of ansible is out, we should upgrade to it (there are several deprecations and warnings to handle)

Beware that this release drop support for yum+python3, so amazon linux nodes will need both for actioning these if you intend to add py3 support)

AC

• [ ] running 2.9.x
• [ ] no new warnings
• [ ] fix current deprecated stuff
• [ ] still works in vens/python 2.7
• [ ] don't upgrade credstash past 1.15

[nathanhruby]

similar work here: department-of-veterans-affairs/vets-contrib#3294

[ricetj]

Need to check if DVP is doing this

[wyattwalter]

We are not going to be doing this. We'll start with new stuff at the latest version and not worry about the in-place upgrade on it.