Parallelize UT runs

mentioned in merge request sue445/create-merge-request!124 (merged)

mentioned in merge request gitlab-org/cli!2107 (merged)

mentioned in merge request gitlab-org/release-tools!4182 (merged)

mentioned in merge request gitlab-org/terraform-provider-gitlab!2493 (merged)

mentioned in merge request gitlab-com/content-sites/handbook-tools/hugolint!148 (merged)

mentioned in merge request fforster/gitlab-mcp!54 (merged)

mentioned in merge request gitlab-com/gl-infra/autolabels!54 (merged)

mentioned in merge request gitlab-com/gl-infra/ringctl!302 (merged)

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!989 (merged)

mentioned in merge request sue445/tanuki_reminder!240 (merged)

mentioned in merge request ydkn/gitlab-runner-cleanup!39 (closed)

mentioned in merge request bitfoode/grc!5

mentioned in merge request gitlab-com/gl-infra/woodhouse!631 (merged)

mentioned in merge request gitlab-org/container-registry!2316 (merged)

mentioned in merge request gitlab-org/cli!2147 (closed)

mentioned in merge request fforster/epic-update!12 (merged)

mentioned in merge request !2340 (merged)

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