fix(affinity): update affinity on server and aggregator to be automatically set

[pinkneyj]

Why?

Affinity is not automatically set for aggregator and server.

What

This change does this, based on code already in webhook-deploy.yaml Although changes have recently been made to set aggregator affinity (#881) and the server affinity can already be set, this just removes the need to do that yourself.
This is also a copy of: Cloudzero/cloudzero-charts#224 but believe this is the repo the change should be made in.

How Tested

Deployed locally. Gives values as expected and can be overridden.