Balance to Asset Balance Conversion (#9076)

* add BalanceConversion trait and implementation

* derive some useful traits on Imbalance

* Update frame/support/src/traits/tokens/fungibles/imbalance.rs

Co-authored-by: Xiliang Chen <xlchen1291@gmail.com>

* make BalanceConversion error type configurable

* add RuntimeDebug import and derive traits on other Imbalance

* formatting

* move BalanceConversion trait to frame-support

* add necessary trait import

Co-authored-by: Xiliang Chen <xlchen1291@gmail.com>