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/coretime/coretime-westend/src/lib.rs

@@ -244,7 +244,7 @@ parameter_types! {
 impl pallet_transaction_payment::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
 	type OnChargeTransaction =
-		pallet_transaction_payment::CurrencyAdapter<Balances, DealWithFees<Runtime>>;
+		pallet_transaction_payment::FungibleAdapter<Balances, DealWithFees<Runtime>>;
 	type OperationalFeeMultiplier = ConstU8<5>;
 	type WeightToFee = WeightToFee;
 	type LengthToFee = ConstantMultiplier<Balance, TransactionByteFee>;

cumulus/parachains/runtimes/coretime/coretime-westend/src/xcm_config.rs

@@ -22,12 +22,12 @@ use super::{
 use frame_support::{
 	pallet_prelude::PalletInfoAccess,
 	parameter_types,
-	traits::{ConstU32, Contains, Equals, Everything, Nothing},
+	traits::{tokens::imbalance::ResolveTo, ConstU32, Contains, Equals, Everything, Nothing},
 };
 use frame_system::EnsureRoot;
+use pallet_collator_selection::StakingPotAccountId;
 use pallet_xcm::XcmPassthrough;
 use parachains_common::{
-	impls::ToStakingPot,
 	xcm_config::{
 		AllSiblingSystemParachains, ConcreteAssetFromSystem, ParentRelayOrSiblingParachains,
 		RelayOrOtherSystemParachains,
@@ -249,7 +249,7 @@ impl xcm_executor::Config for XcmConfig {
 		TokenRelayLocation,
 		AccountId,
 		Balances,
-		ToStakingPot<Runtime>,
+		ResolveTo<StakingPotAccountId<Runtime>, Balances>,
 	>;
 	type ResponseHandler = PolkadotXcm;
 	type AssetTrap = PolkadotXcm;