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

cumulus/parachains/runtimes/assets/asset-hub-rococo/src/xcm_config.rs

@@ -27,14 +27,13 @@ use assets_common::{
 use frame_support::{
 	parameter_types,
 	traits::{
-		tokens::imbalance::ResolveAssetTo, ConstU32, Contains, Equals, Everything, Nothing,
-		PalletInfoAccess,
+		tokens::imbalance::{ResolveAssetTo, ResolveTo},
+		ConstU32, Contains, Equals, Everything, Nothing, PalletInfoAccess,
 	},
 };
 use frame_system::EnsureRoot;
 use pallet_xcm::XcmPassthrough;
 use parachains_common::{
-	impls::ToStakingPot,
 	xcm_config::{
 		AllSiblingSystemParachains, AssetFeeAsExistentialDepositMultiplier,
 		ConcreteAssetFromSystem, ParentRelayOrSiblingParachains, RelayOrOtherSystemParachains,
@@ -569,7 +568,13 @@ impl xcm_executor::Config for XcmConfig {
 		MaxInstructions,
 	>;
 	type Trader = (
-		UsingComponents<WeightToFee, TokenLocation, AccountId, Balances, ToStakingPot<Runtime>>,
+		UsingComponents<
+			WeightToFee,
+			TokenLocation,
+			AccountId,
+			Balances,
+			ResolveTo<StakingPot, Balances>,
+		>,
 		cumulus_primitives_utility::SwapFirstAssetTrader<
 			TokenLocationV3,
 			crate::AssetConversion,