Unable to directly modify gitaly.socket_path in gitlab.yml

As an administrator I expect to be able to change the value of gitaly.socket_path in gitlab.yml via gitlab_rails['gitaly_socket_path']. However, this is currently not possible. There is a hard override of this setting.

https://gitlab.com/gitlab-org/omnibus-gitlab/blob/aeb205d124ec057064889d98eb77e73f5d7fa602/files/gitlab-cookbooks/gitlab/recipes/gitlab-rails.rb#L229-250

I think the correct behavior would be to have a gitlab_rails['gitaly_socket_path'] that can be changed directly.

The current situation would not allow us to run Gitaly on another host, for instance.