[IMPROVE] User data download overhaul (#26358)

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

apps/meteor/app/mailer/server/api.ts

apps/meteor/app/retention-policy/server/cronPruneMessages.ts

apps/meteor/app/user-data-download/index.js

apps/meteor/app/user-data-download/server/DataExport.js

...eor/app/user-data-download/server/cronProcessDownloads.js

apps/meteor/app/user-data-download/server/exportDownload.js

apps/meteor/app/user-data-download/server/index.js

apps/meteor/definition/externals/meteor/ostrio-cookies.d.ts

apps/meteor/package.json

apps/meteor/packages/rocketchat-i18n/i18n/af.i18n.json

apps/meteor/packages/rocketchat-i18n/i18n/ar.i18n.json

apps/meteor/packages/rocketchat-i18n/i18n/az.i18n.json

apps/meteor/packages/rocketchat-i18n/i18n/be-BY.i18n.json

apps/meteor/packages/rocketchat-i18n/i18n/bg.i18n.json

apps/meteor/packages/rocketchat-i18n/i18n/bn-BD.i18n.json

apps/meteor/packages/rocketchat-i18n/i18n/bn-IN.i18n.json

apps/meteor/packages/rocketchat-i18n/i18n/bs.i18n.json

apps/meteor/packages/rocketchat-i18n/i18n/ca.i18n.json

apps/meteor/packages/rocketchat-i18n/i18n/cs.i18n.json