chore(x/feegrant): use `cosmossdk.io/core/codec` instead of `github.com/cosmos/cosmos-sdk/codec` #77589

Job	Run time
split-test-files	10s
test-clientv2	32s
test-collections	26s
test-collections-protocodec	26s
test-core	22s
test-coretesting	26s
test-depinject	37s
test-errors	30s
test-indexer-postgres	23s
test-integration	5m 27s
test-math	30s
test-orm	23s
test-schema	32s
test-schema-testing	24s
test-simapp-v2	13m 26s
test-sim-nondeterminism	30s
test-confix	24s
test-cosmovisor	34s
test-hubl	27s
test-log	26s
test-store	24s
test-store-v2	29s
test-x-accounts	28s
test-x-accounts-base	24s
test-x-accounts-lockup	22s
test-x-accounts-multisig	19s
test-x-nft	27s
test-x-tx	28s
test-tools-benchmark	42s
test-x-authz	24s
test-x-bank	23s
test-x-circuit	28s
test-x-consensus	33s
test-x-distribution	26s
test-x-epochs	27s
test-x-evidence	23s
test-x-feegrant	46s
test-x-gov	32s
test-x-group	28s
test-x-mint	32s
test-x-protocolpool	26s
test-x-slashing	26s
test-x-staking	28s
test-x-upgrade	29s
tests (00)	8m 8s
tests (01)	3m 45s
tests (02)	3m 44s
tests (03)	4m 15s
repo-analysis	32s
	58m 33s

Provide feedback