Convert top-level dashboard components to TypeScript (#37703)

* Convert `DashboardApp` to TypeScript

* Convert `Dashboard` to TypeScript

* Convert `DashboardGrid` to TypeScript

* Convert `DashboardHeader` to TypeScript

* Bind `setDashboardAttribute` method

* Fix adding dashcards

* Fix question's "Add to dashboard" flow

* Remove `fetchCardData` prop from `DashCard` (not used)

* Make `editingTitle` prop optional

* Move `fetchPulseFormInput` to `DispatchProps`

* Fix TODO types in `DashboardGrid`

* Fix error handling

* Replace `any` with `unknown`

* Fix `any` in `DashboardGrid`

* Fix `onMainScroll` type