Handle names for default timelines (#21514)

frontend/src/metabase-types/api/mocks/timeline.ts

frontend/src/metabase-types/api/timeline.ts

frontend/src/metabase/entities/timeline-events/forms.js

frontend/src/metabase/entities/timelines.js

frontend/src/metabase/entities/timelines/forms.js

frontend/src/metabase/lib/timelines.ts

frontend/src/metabase/query_builder/selectors.js

frontend/src/metabase/schema.js

...ctions/components/EditTimelineModal/EditTimelineModal.tsx

...lections/components/NewTimelineModal/NewTimelineModal.tsx

...ines/collections/components/TimelineCard/TimelineCard.tsx

.../components/TimelineDetailsModal/TimelineDetailsModal.tsx

...s/TimelineDetailsModal/TimelineDetailsModal.unit.spec.tsx

...ctions/components/TimelineListModal/TimelineListModal.tsx

.../containers/TimelineDetailsModal/TimelineDetailsModal.tsx

...elines/questions/components/TimelineCard/TimelineCard.tsx

frontend/test/__support__/e2e/commands/api/timeline.js

.../test/metabase/scenarios/collections/timelines.cy.spec.js

...end/test/metabase/scenarios/question/timelines.cy.spec.js

src/metabase/api/timeline.clj