* Migrate remaining old decl_* macros to the new pallet attribute macros

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* Apply review suggestions

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* Apply review suggestions

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* use pallet::storage

* Fix dev rpc test

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* Fix service tests

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

Signed-off-by: koushiro <koushiro.cqx@gmail.com>