[TASK] slash_delegator - slash maximum possible

[1xstj]

// Calculate and apply slash
			let slash_amount = percentage.mul_floor(delegation.amount);
			// TODO: IF SLASH AMOUNT IS GREATER THAN DELEGATION AMOUNT
			// TODO: WE WOULD RATHER TAKE THE ENTIRE DELEGATION, NO?
			delegation.amount = delegation
				.amount
				.checked_sub(&slash_amount)
				.ok_or(Error::<T>::InsufficientStakeRemaining)?;

if delegation.amount is less than slash then slash (max(slash_amount, delegation_amount))