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/bin/node/runtime/src/lib.rs

@@ -71,6 +71,9 @@ use pallet_im_online::sr25519::AuthorityId as ImOnlineId;
 use pallet_nfts::PalletFeatures;
 use pallet_nis::WithMaximumOf;
 use pallet_session::historical as pallet_session_historical;
+// Can't use `FungibleAdapter` here until Treasury pallet migrates to fungibles
+// <https://github.com/paritytech/polkadot-sdk/issues/226>
+#[allow(deprecated)]
 pub use pallet_transaction_payment::{CurrencyAdapter, Multiplier, TargetedFeeAdjustment};
 use pallet_transaction_payment::{FeeDetails, RuntimeDispatchInfo};
 use pallet_tx_pause::RuntimeCallNameOf;
@@ -549,6 +552,9 @@ parameter_types! {
 	pub MaximumMultiplier: Multiplier = Bounded::max_value();
 }
 
+// Can't use `FungibleAdapter` here until Treasury pallet migrates to fungibles
+// <https://github.com/paritytech/polkadot-sdk/issues/226>
+#[allow(deprecated)]
 impl pallet_transaction_payment::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
 	type OnChargeTransaction = CurrencyAdapter<Balances, DealWithFees>;