Sims

refactor: migrate to `cosmos/gogoproto` #3509

Job	Run time
cleanup-runs	6s
build	2m 19s
install-runsim	33s
test-sim-after-import-short	7m 9s
test-sim-nondeterminism-short	1m 58s
test-sim-import-export-short	3m 49s
test-sim-multi-seed-short	8m 2s
	23m 56s

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