Gitlab no longer setting upstream global hosts config

As part of the migration to bb-common some upstream config (in global) was removed, it was configuring the hosts internally for Gitlab.

It should be setting this for the GitLab chart:

global:
  hosts:
    domain: {{ $domainName }}

    gitlab:
      name: {{ .Values.addons.gitlab.hostnames.gitlab }}.{{ $domainName }}

    registry:
      name: {{ .Values.addons.gitlab.hostnames.registry }}.{{ $domainName }}