feat(client_options): Added unit tests

mentioned in commit a46ba96d

mentioned in merge request gitlab-org/terraform-provider-gitlab!2739

mentioned in merge request gitlab-org/cli!2469 (merged)

mentioned in merge request gitlab-org/release-tools!4519 (closed)

mentioned in merge request gitlab-com/gl-infra/oncall-robot-assistant!104

mentioned in merge request fforster/epic-update!27 (merged)

mentioned in merge request fforster/gitlab-mcp!181 (merged)

mentioned in merge request gitlab-com/gl-infra/autolabels!110 (merged)

mentioned in merge request gitlab-com/gl-infra/ringctl!371 (merged)

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!1274 (merged)

mentioned in merge request sickit/token-operator!17 (merged)

mentioned in merge request gitlab-com/gl-infra/woodhouse!681

mentioned in merge request schober-server/kubernetes/images/gitlab-token-refresher!35

mentioned in merge request ydkn/gitlab-runner-cleanup!42

mentioned in merge request gitlab-org/container-registry!2572 (merged)

mentioned in merge request gitlab-org/release-tools!4528 (merged)