move aggregation out of `EndBlock` #97

Job	Run time
build-primary	2m 48s
build-ibc	2m 52s
prepare	25s
test (TestGas)	3m 52s
test (TestIbcInterchainQuery)	4m 36s
test (TestLayerFlow)	4m 0s
test (TestGetCyclelist)	2m 40s
test (TestLayerUpgrade)	2m 45s
	23m 58s

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