feat: New endpoint for listing rooms & discussions from teams (#33177)

.changeset/soft-mirrors-remember.md

apps/meteor/app/api/server/v1/teams.ts

apps/meteor/server/models/raw/Rooms.ts

apps/meteor/server/services/team/service.ts

apps/meteor/tests/data/teams.helper.ts

apps/meteor/tests/end-to-end/api/teams.ts

packages/core-services/src/types/ITeamService.ts

packages/model-typings/src/models/IRoomsModel.ts

packages/rest-typings/src/v1/teams/TeamsListChildren.ts

packages/rest-typings/src/v1/teams/index.ts