Replace gitlab exporter generator functions with helm data

From: https://gitlab.com/gitlab-org/gl-openshift/gitlab-operator/-/issues/1#note_447387527

Replacing the skeleton generators (like GitalySecret in place now with the final output handled via accessors (from Helm Template).

1. This can be parallelized on a per-chart basis
2. Deploy using this new model/accessors

Details

Remove the existing gitlab exporter generators (configmap, secret, deployment), and instead create a function that applies the gitlab exporter chart from the helm data model (established in https://gitlab.com/gitlab-org/gl-openshift/gitlab-operator/-/issues/33)