feat(spec)!: object-metric drillDown.report is ReportSchema, object-timeline items the entry kind its variant selects, and action:group / action:menu members a closed inline action (#21464, S-final)

feat(spec)!: object-metric drillDown.report is ReportSchema, object-timeline items the entry kind its variant selects, and action:group / action:menu members a closed inline action (#21464, S-final) #8752