Remove `pallet::getter` usage from the pallet-balances (#4967)
As per #3326, removes usage of the `pallet::getter` macro from the balances pallet. The syntax `StorageItem::<T, I>::get()` should be used instead. Also, adds public functions for compatibility. cc @muraca polkadot address: 5GsLutpKjbzsbTphebs9Uy4YK6gTN47MAaz6njPktidjR5cp --------- Co-authored-by: Bastian Köcher <[email protected]> Co-authored-by: Oliver Tale-Yazdi <[email protected]>