refactor(staking): use validator & address codecs in staking (backport #16958)

[mergify]

This is an automatic backport of pull request #16958 done by Mergify.
Cherry-pick of c23505b has failed:

On branch mergify/bp/release/v0.50.x/pr-16958
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Changes to be committed:
	modified:   api/cosmos/staking/v1beta1/staking.pulsar.go
	modified:   proto/cosmos/staking/v1beta1/staking.proto
	modified:   tests/e2e/distribution/grpc_query_suite.go
	modified:   tests/integration/distribution/keeper/grpc_query_test.go
	modified:   tests/integration/staking/keeper/delegation_test.go
	modified:   tests/integration/staking/keeper/slash_test.go
	modified:   tests/integration/staking/keeper/unbonding_test.go
	modified:   testutil/sims/app_helpers.go
	modified:   x/distribution/keeper/delegation_test.go
	modified:   x/distribution/keeper/grpc_query.go
	modified:   x/distribution/keeper/invariants.go
	modified:   x/distribution/simulation/operations.go
	modified:   x/distribution/testutil/expected_keepers_mocks.go
	modified:   x/distribution/testutil/staking_helper.go
	modified:   x/distribution/types/expected_keepers.go
	modified:   x/distribution/types/query.go
	modified:   x/gov/keeper/tally.go
	modified:   x/slashing/abci_test.go
	modified:   x/slashing/keeper/msg_server_test.go
	modified:   x/staking/keeper/delegation.go
	modified:   x/staking/keeper/delegation_test.go
	modified:   x/staking/keeper/genesis.go
	modified:   x/staking/keeper/grpc_query.go
	modified:   x/staking/keeper/invariants.go
	modified:   x/staking/keeper/msg_server.go
	modified:   x/staking/keeper/msg_server_test.go
	modified:   x/staking/keeper/query_utils.go
	modified:   x/staking/migrations/v5/migrations_test.go
	modified:   x/staking/simulation/decoder_test.go
	modified:   x/staking/simulation/genesis.go
	modified:   x/staking/simulation/operations.go
	modified:   x/staking/simulation/operations_test.go
	modified:   x/staking/types/delegation.go
	modified:   x/staking/types/delegation_test.go
	modified:   x/staking/types/exported.go
	modified:   x/staking/types/staking.pb.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   CHANGELOG.md
	both modified:   tests/integration/distribution/keeper/msg_server_test.go
	both modified:   tests/integration/staking/keeper/validator_bench_test.go
	both modified:   x/distribution/keeper/delegation.go
	both modified:   x/distribution/simulation/operations_test.go
	both modified:   x/slashing/simulation/operations_test.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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