cherrypicked change from v16.0.1 to bump cometbft to v0.38.21

[monopauli]

1. Overview

CometBFT version bumped to v0.38.21 to include a critical security fix (GHSA-c32p-wcqj-j677)

2. Implementation details

The go.mod file in the repository root directory and the go.mod file in the interchaintest module have been updated to use CometBFT v0.38.21

[github-actions]

Code Coverage Report

Coverage after merging test/cometbft-0.38.21-cherrypick into main

36.96%

Coverage Report

File	Branches	Funcs	Lines	Uncovered Lines
app
ante_handler.go	100%	100%	0%	..., 67, 68, 69, 70
fee_denom_whitelist_decorator.go	100%	100%	93.33%	44, 45
export.go	100%	100%	0%	..., 96, 97, 98, 99
test_helpers.go	100%	100%	0%	..., 70, 71, 72, 73
app.go	100%	100%	1.24%	..., 511, 512, 513, 83
encoding.go	100%	100%	0%	..., 96, 97, 98, 99
modules.go	100%	100%	0%	..., 96, 97, 98, 99
app/constants
constants.go	100%	100%	0%	..., 62, 63, 64, 65
app/keepers
keepers.go	100%	100%	0%	..., 469, 470, 471, 472
keys.go	100%	100%	0%	..., 89, 94, 95, 96
app/params
proto.go	100%	100%	0%	..., 40, 41, 42, 43
app/upgrades/testnet/v17.0.0-rc0
upgrades.go	100%	100%	0%	..., 20, 21, 23, 24
app/upgrades/v17.0.0
upgrades.go	100%	100%	0%	..., 20, 21, 23, 24
cmd/persistenceCore
main.go	100%	100%	0%	..., 20, 21, 22, 23
cmd/persistenceCore/cmd
testnet.go	100%	100%	60.75%	..., 538, 539, 95, 96
root.go	100%	100%	0%	..., 96, 97, 98, 99
wasmbindings
wasm.go	100%	100%	0%	..., 38, 39, 40, 41
x/halving
module.go	100%	100%	0%	..., 96, 97, 98, 99
genesis.go	100%	100%	0%	..., 25, 26, 27, 29
autocli.go	100%	100%	0%	..., 33, 34, 35, 36
abci.go	100%	100%	0%	..., 50, 51, 52, 53
x/halving/client/cli
tx.go	100%	100%	0%	..., 61, 63, 66, 67
x/halving/keeper
grpc_query.go	100%	100%	0%	..., 21, 22, 23, 25
msg_server.go	100%	100%	0%	..., 34, 35, 36, 38
keeper.go	100%	100%	0%	..., 86, 90, 91, 92
x/halving/simulation
genesis.go	100%	100%	70%	17, 18, 19
x/halving/types
genesis.go	100%	100%	86.67%	25, 26
msg.go	100%	100%	0%	..., 53, 54, 55, 57
codec.go	100%	100%	53.33%	..., 44, 45, 46, 47
params.go	100%	100%	92.31%	37, 38
x/liquidstake
abci.go	100%	100%	83.33%	19, 20
module.go	100%	100%	89.29%	..., 64, 65, 93, 95
autocli.go	100%	100%	100%
x/liquidstake/keeper
hooks.go	100%	100%	90.91%	35, 36
grpc_query.go	100%	100%	79.31%	..., 42, 43, 56, 57
keeper.go	100%	100%	79.07%	..., 76, 77, 93, 94
liquidstake.go	100%	100%	41.33%	..., 985, 986, 987, 988
rebalancing.go	100%	100%	83.95%	..., 53, 54, 88, 89
genesis.go	100%	100%	82.61%	14, 23, 32, 40
x/liquidstake/types
msgs.go	100%	100%	71.07%	..., 51, 52, 63, 71
params.go	100%	100%	80%	..., 249, 250, 251, 252
keys.go	100%	100%	100%
genesis.go	100%	100%	100%
liquidstake.go	100%	100%	92.31%	..., 66, 67, 76, 84
rebalancing.go	100%	100%	84%	22, 23, 40, 41
codec.go	100%	100%	100%