Migrate fee payment from Currency to fungible (#2292)

Part of https://github.com/paritytech/polkadot-sdk/issues/226 
Related https://github.com/paritytech/polkadot-sdk/issues/1833

- Deprecate `CurrencyAdapter` and introduce `FungibleAdapter`
- Deprecate `ToStakingPot` and replace usage with `ResolveTo`
- Required creating a new `StakingPotAccountId` struct that implements
`TypedGet` for the staking pot account ID
- Update parachain common utils `DealWithFees`, `ToAuthor` and
`AssetsToBlockAuthor` implementations to use `fungible`
- Update runtime XCM Weight Traders to use `ResolveTo` instead of
`ToStakingPot`
- Update runtime Transaction Payment pallets to use `FungibleAdapter`
instead of `CurrencyAdapter`
- [x] Blocked by https://github.com/paritytech/polkadot-sdk/pull/1296,
needs the `Unbalanced::decrease_balance` fix

substrate/frame/transaction-payment/asset-tx-payment/src/mock.rs

@@ -28,7 +28,7 @@ use frame_support::{
 };
 use frame_system as system;
 use frame_system::EnsureRoot;
-use pallet_transaction_payment::CurrencyAdapter;
+use pallet_transaction_payment::FungibleAdapter;
 use sp_core::H256;
 use sp_runtime::traits::{BlakeTwo256, ConvertInto, IdentityLookup, SaturatedConversion};
 
@@ -139,7 +139,7 @@ impl WeightToFeeT for TransactionByteFee {
 #[derive_impl(pallet_transaction_payment::config_preludes::TestDefaultConfig)]
 impl pallet_transaction_payment::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
-	type OnChargeTransaction = CurrencyAdapter<Balances, ()>;
+	type OnChargeTransaction = FungibleAdapter<Balances, ()>;
 	type WeightToFee = WeightToFee;
 	type LengthToFee = TransactionByteFee;
 	type FeeMultiplierUpdate = ();