Add StorageKeys derive macro

[sug0]

Allows us to derive storage key helpers from a struct comprised solely of &'static str fields.

For instance:

#[derive(StorageKeys)]
struct Keys {
  param1: &'static str,
  param2: &'static str,
}

Would generate a VALUES field with param1 set to "param1" and param2 set to "param2". It would also generate a sorted slice ALL, whose contents are "param1" and "param2", which can be used to efficiently match a storage key, with a binary search over ALL.

[juped]

rebased forward because of CI docs pushing issue

[batconjurer]

You need to add unit tests. I made a PR with a happy flow unit test. But obviously many unhappy flows should be checked. Parameters with the same name, types other than &'static string, etc.

[sug0]

For reference, added changes from #937

[juped]

pls update wasm

[tzemanovic]

@brentstone there's some test_tx_change_validator_commissions case failing in https://github.com/anoma/namada/actions/runs/3750000986/jobs/6369272997#step:8:37077, it's got the seed there

[brentstone]

@brentstone there's some test_tx_change_validator_commissions case failing in https://github.com/anoma/namada/actions/runs/3750000986/jobs/6369272997#step:8:37077, it's got the seed there

See #965

[tzemanovic]

@brentstone there's some test_tx_change_validator_commissions case failing in https://github.com/anoma/namada/actions/runs/3750000986/jobs/6369272997#step:8:37077, it's got the seed there

fixed in #965