Standardize services to use `GitlabClient` instead of `Gitlab::Client`
We have a couple of services that are using Gitlab::Client
(which is the client from the gitlab gem):
ApproveService
MergeWhenPipelineSucceeds
- Perhaps some more...
Ideally, all our services should use GitlabClient
, or the dev/ops variant, that are the release-tools abstractions to access the methods offered by the gem.