Resolve Credit to Account impls of `OnUnbalanced` trait (#1876)
Implements the `OnUnbalanced` trait to resolve received credits to the specified account. Credits that fail to resolve are dropped. ### Motivation Throughout the codebase, several types implement the trait with the same behavior. While some currently utilize older currency trait, a migration to the new fungible/s is anticipated for all. Examples: [1](https://github.com/paritytech/polkadot-sdk/blob/1b34571c/cumulus/parachains/common/src/impls.rs#L37), [2](https://github.com/paritytech/polkadot-sdk/blob/1b34571c/polkadot/runtime/common/src/impls.rs#L36), [3](https://github.com/paritytech/polkadot-sdk/blob/1b34571c/substrate/bin/node/runtime/src/impls.rs#L40), [4](https://github.com/paritytech/polkadot-sdk/blob/1b34571c/substrate/bin/node/runtime/src/lib.rs#L1969), [5](https://github.com/paritytech/polkadot-sdk/blob/1b34571c/substrate/frame/broker/src/mock.rs#L198), [6](https://github.com/paritytech/polkadot-sdk/blob/1b34571c/substrate/frame/society/src/lib.rs#L2031), [7](https://github.com/paritytech/polkadot-sdk/blob/1b34571c/substrate/frame/treasury/src/lib.rs#L1118)