Consolidate TextValue and List Item view

[gemcoder21]

var earnTitle: String { Localized.Common.earn }

    var earnAprText: String {
        guard let apr = assetDataModel.earnApr else { return .empty }
        return Localized.Stake.apr(CurrencyFormatter.percentSignLess.string(apr))
}

should be just

var earnTextValue: TextValue(
   title: Localized.Common.earn, 
   value: Localized.Stake.apr(CurrencyFormatter.percentSignLess.string(apr))
)