feat: implement Runner Controller API

mentioned in commit dd8a488c

mentioned in merge request gitlab-org/cli!2688 (merged)

mentioned in merge request gitlab-com/gl-infra/woodhouse!738

mentioned in merge request hojerdev/git-sync!72

mentioned in merge request gitlab-org/release-tools!4633

mentioned in merge request gitlab-com/gl-infra/oncall-robot-assistant!110

mentioned in merge request schober-server/kubernetes/images/gitlab-token-refresher!37

mentioned in merge request fforster/epic-update!51

mentioned in merge request fforster/gitlab-mcp!224

mentioned in merge request gitlab-com/gl-infra/autolabels!148

mentioned in merge request gitlab-com/gl-infra/ringctl!429

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!1455

mentioned in merge request sickit/token-operator!47

mentioned in merge request ydkn/gitlab-runner-cleanup!46 (closed)