Broken pallet_nomination_pools benchmark after existential deposit change

[HCastano]

In #901 we changed the existential deposit from 10_000 units to 1 unit. After doing
this however the pallet_nomination_pool pallet's bond_extra_transfer benchmark
started failing:

Error: Input("Benchmark pallet_nomination_pools::bond_extra_transfer failed: Funds are unavailable")

It looks like by changing the ED we changed the value of the depositor_min_bond() which
is used by the benchmark.

pub fn depositor_min_bond() -> BalanceOf<T> {
    T::Staking::minimum_nominator_bond()
        .max(MinCreateBond::<T>::get())
        .max(MinJoinBond::<T>::get())
        .max(T::Currency::minimum_balance())
}

I have been able to work around the issue by:

1. Returning the ED to the old value
2. Adding the following to the dev chainspec

"nominationPools": {
    "minCreateBond": 10_000 * DOLLARS,
    "minJoinBond": 5 * DOLLARS,
},

Note that the minCreateBond value is equal to the old ED, and so is equivalent to
workaround (1).

Another thing to note here is that when the benches do run they give this warning:

2024-06-26 12:16:22 pool 1 has incorrect ED frozen that can result from change in ED. Expected  = 10000000000,  Actual = 0

Ideally we find the true cause of why this is failing and we can have some "reasonble"
values for both the ED the minCreateBond.