feat: add separate flag for metrics #959

Job	Run time
fee-grant	7m 33s
legacy	3m 33s
fee-middleware	2m 15s
events	3m 36s
misbehaviour	2m 16s
multiple-paths	2m 45s
prepare-scenario-matrix	2m 44s
scenarios (TestScenarioClientThresholdUpdate)	4m 36s
scenarios (TestScenarioClientTrustingPeriodUpdate)	4m 43s
scenarios (TestScenarioICAChannelClose)	4m 42s
scenarios (TestScenarioInterchainAccounts)	3m 42s
scenarios (TestScenarioPathFilterAllow)	1m 56s
scenarios (TestScenarioPathFilterDeny)	1m 58s
scenarios (TestScenarioTendermint37Boundary)	3m 12s
scenarios (TestScenarioStrideICAandICQ)	31s
	50m 2s

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