Upgrade ansible

[mlandauer]

We're currently using Ansible 2.8.17.

We're currently blocked from upgrading Ansible to 2.9.x by the use of sudo and sudo_user in the third-party postgres role. However, we can't easily upgrade this because it doesn't yet support postgresql 13 which is what we're currently running in production.

The commit for the postgresql role that fixes the deprecation warning about sudo is ANXS/postgresql@f6d4205 which is first used in v1.4.0.