We currently leverage a `init.sh` script executed from the `init` container to render and merge the configurations into the `heat.conf` file. This rendering should instead be done in Go during the operators reconcile function.

So, we would ideally remove the use of `crudini`:
https://github.com/openstack-k8s-operators/heat-operator/blob/main/templates/heat/bin/init.sh#L55

To do this effectively, we probably need to maintain a full sample of the `heat.conf` configuration rather than a partial and then trying to merge the defaults with our custom configuration.