Migrate `pallet-sudo` to `pallet!` (#8448)

* WIP convert sudo pallet to attribute macros

* Fix up tests and migrate mock

* Fix up genesis build

* Migrate doc comment example

* Update frame/sudo/src/lib.rs

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

* Update frame/sudo/src/lib.rs

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

* Update frame/sudo/src/lib.rs

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

* Update frame/sudo/src/lib.rs

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

* Allow unused metadata call_functions

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>