chore(x/staking): use `cosmossdk.io/core/codec` instead of `github.com/cosmos/cosmos-sdk/codec` #77568

Job	Run time
split-test-files	18s
test-integration	5m 48s
test-clientv2	27s
test-core	28s
test-coretesting	26s
test-depinject	36s
test-sim-nondeterminism	28s
test-collections	27s
test-collections-protocodec	25s
test-errors	34s
test-indexer-postgres	24s
test-math	30s
test-orm	27s
test-schema	27s
test-schema-testing	24s
test-simapp-v2	13m 17s
test-confix	27s
test-cosmovisor	28s
test-hubl	26s
test-store	24s
test-log	26s
test-store-v2	26s
test-x-accounts	26s
test-x-accounts-base	25s
test-x-accounts-lockup	24s
test-x-accounts-multisig	23s
test-x-circuit	25s
test-x-distribution	24s
test-x-evidence	26s
test-x-gov	26s
test-x-group	33s
test-x-nft	33s
test-x-feegrant	32s
test-x-protocolpool	31s
test-x-tx	29s
test-x-upgrade	35s
test-tools-benchmark	32s
test-x-authz	25s
test-x-bank	26s
test-x-consensus	25s
test-x-epochs	25s
test-x-slashing	24s
test-x-mint	23s
test-x-staking	1m 1s
tests (00)	8m 13s
tests (01)	3m 37s
tests (02)	3m 51s
tests (03)	4m 11s
repo-analysis	32s
	59m 0s

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