Chore: Update Meteor 2.7.3 (#25991)

.github/workflows/build_and_test.yml

apps/meteor/.docker-mongo/Dockerfile

apps/meteor/.docker/Dockerfile

apps/meteor/.docker/Dockerfile.alpine

apps/meteor/.meteor/packages

apps/meteor/.meteor/release

apps/meteor/.meteor/versions

apps/meteor/app/api/server/lib/emailInbox.ts

apps/meteor/app/api/server/lib/emoji-custom.ts

apps/meteor/app/api/server/lib/messages.ts

apps/meteor/app/api/server/lib/rooms.ts

apps/meteor/app/api/server/lib/users.ts

apps/meteor/app/api/server/v1/channels.js

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

apps/meteor/app/api/server/v1/chat.js

apps/meteor/app/api/server/v1/custom-sounds.ts

apps/meteor/app/api/server/v1/custom-user-status.ts

apps/meteor/app/api/server/v1/emoji-custom.ts

apps/meteor/app/api/server/v1/groups.js

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