ac970f52be
* feat: add (re)delegation getters (#11596)
### Description
This PR adds general helper functions to the `x/staking` module that are used in the Evmos `x/vesting` module and originated from Agoric's custom staking module implementation https://github.com/agoric-labs/cosmos-sdk/blob/4085-true-vesting/x/staking/keeper/delegation.go.
- `GetDelegatorUnbonding`
- `GetDelegatorBonded`
- `IterateDelegatorUnbondingDelegations`
- `IterateDelegatorDelegations`
- `IterateDelegatorRedelegations`
(cherry picked from commit
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| .. | ||
| client | ||
| keeper | ||
| legacy | ||
| simulation | ||
| spec | ||
| teststaking | ||
| types | ||
| abci.go | ||
| app_test.go | ||
| bench_test.go | ||
| common_test.go | ||
| genesis.go | ||
| genesis_test.go | ||
| handler.go | ||
| handler_test.go | ||
| module.go | ||
| module_test.go | ||