Chore: Omnichannel endpoints e2e tests (#26376)

apps/meteor/app/livechat/imports/server/rest/departments.ts

apps/meteor/app/livechat/imports/server/rest/inquiries.js

apps/meteor/app/livechat/imports/server/rest/sms.js

apps/meteor/app/livechat/imports/server/rest/users.js

apps/meteor/app/livechat/imports/server/rest/visitors.js

apps/meteor/app/livechat/server/api/lib/departments.ts

apps/meteor/app/livechat/server/api/lib/inquiries.js

apps/meteor/app/livechat/server/api/lib/visitors.js

apps/meteor/app/livechat/server/api/v1/room.js

apps/meteor/app/sms/server/SMS.js

apps/meteor/tests/data/livechat/department.ts

apps/meteor/tests/data/livechat/rooms.ts

apps/meteor/tests/data/livechat/sample.png

apps/meteor/tests/end-to-end/api/livechat/00-rooms.ts

apps/meteor/tests/end-to-end/api/livechat/01-agents.ts

apps/meteor/tests/end-to-end/api/livechat/02-appearance.ts

.../meteor/tests/end-to-end/api/livechat/03-custom-fields.ts

apps/meteor/tests/end-to-end/api/livechat/04-dashboards.ts

apps/meteor/tests/end-to-end/api/livechat/05-inquiries.js

apps/meteor/tests/end-to-end/api/livechat/05-inquiries.ts