Migrate fee payment from Currency to fungible (paritytech#2292)

Part of paritytech/polkadot-sdk#226
Related paritytech/polkadot-sdk#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 paritytech/polkadot-sdk#1296,
needs the `Unbalanced::decrease_balance` fix

(cherry picked from commit bda4e75ac49786a7246531cf729b25c208cd38e6)

bin/runtime-common/src/mock.rs

@@ -166,7 +166,7 @@ impl pallet_balances::Config for TestRuntime {
 
 #[derive_impl(pallet_transaction_payment::config_preludes::TestDefaultConfig)]
 impl pallet_transaction_payment::Config for TestRuntime {
-	type OnChargeTransaction = pallet_transaction_payment::CurrencyAdapter<Balances, ()>;
+	type OnChargeTransaction = pallet_transaction_payment::FungibleAdapter<Balances, ()>;
 	type OperationalFeeMultiplier = ConstU8<5>;
 	type WeightToFee = IdentityFee<ThisChainBalance>;
 	type LengthToFee = ConstantMultiplier<ThisChainBalance, TransactionByteFee>;