Dashboard converted to TypeScript (#22882)

* Dashboard converted to TypeScript

* Remove Dashboard as it seems to be unused

frontend/src/metabase-lib/lib/Dashboard.ts

-// eslint-disable-next-line @typescript-eslint/ban-ts-comment
-// @ts-nocheck
-export default class Dashboard {
-  // eslint-disable-next-line @typescript-eslint/no-empty-function
-  getParameters() {}
-}