Function bridge_hub_test_utils::check_sane_fees_values

pub fn check_sane_fees_values(
    const_name: &str,
    actual: u128,
    calculate_estimated_fee: fn() -> u128,
    overestimate_in_percent: Perbill,
    margin_overestimate_diff_in_percent_for_lowering: Option<i16>,
    label: &str,
)

A helper function for comparing the actual value of a fee constant with its estimated value. The estimated value can be overestimated (overestimate_in_percent), and if the difference to the actual value is below margin_overestimate_diff_in_percent_for_lowering, we should lower the actual value.