Overload `basis` and other functions for nested backend objects

Double-check that the following functions

- `ADTypes.mode`
- `basis`
- `check_available`, `inplace_support`, `pushforward_performance`, `pullback_performance`, `hvp_mode`

are correctly implemented for the following types

- `AutoSparse`
- `SecondOrder`
- `MixedMode`
- `FromPrimitive`