refactor!: remove testutil/network #75979

Job	Run time
split-test-files	16s
test-integration	9m 32s
test-sim-nondeterminism	5m 55s
test-clientv2	38s
test-core	31s
test-coretesting	32s
test-system	12m 18s
test-collections	38s
test-collections-protocodec	35s
test-cosmovisor	32s
test-depinject	28s
test-errors	29s
test-indexer-postgres	23s
test-math	34s
test-orm	27s
test-schema	27s
test-simapp	1m 10s
test-simapp-v2	5m 37s
test-confix	37s
test-schema-testing	21s
test-hubl	35s
test-log	32s
test-store	42s
test-store-v2	48s
test-x-accounts-base	30s
test-x-accounts	33s
test-x-accounts-lockup	33s
test-x-accounts-multisig	33s
test-x-circuit	44s
test-x-distribution	39s
test-x-evidence	40s
test-x-feegrant	35s
test-x-nft	37s
test-x-params	31s
test-x-protocolpool	32s
test-x-tx	31s
test-x-upgrade	43s
test-x-authz	34s
test-x-bank	42s
test-x-epochs	44s
test-x-gov	32s
test-x-group	41s
test-x-slashing	46s
test-x-staking	37s
test-x-consensus	31s
test-x-mint	41s
tests (00)	8m 37s
tests (01)	3m 49s
tests (02)	4m 18s
tests (03)	4m 28s
repo-analysis	1m 41s
	1h 20m 59s

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