[FEATURE] Add median values to aggregated test results and adjust min/max values

[OVI3D0]

Is your feature request related to a problem? Please describe

Currently, the new aggregate command in OSB combines multiple test executions into one averaged result. Rather than just combining all the minimum and maximum values from each test execution for an average 'min' and 'max' value, it might be more useful to provide the minimum and maximum across all test executions. In addition, another measurement like the median value across all test executions could also provide more insight to the user.