[FEATURE] Support custom iteration values in new aggregate command

[OVI3D0]

Is your feature request related to a problem? Please describe

Currently, the new aggregate command calculates weighted averages for metrics using the number of iterations for each operation. However, some users may want to run their workloads with custom iteration values. We should update the aggregate command so it can support cases where users want to run operations with custom values.

Describe the solution you'd like

First, the workloads should be updated to support configurable iteration values. This way, there are named values that can be accessed to check if users ran a workload with custom iteration values. The aggregator class should then perform a check for these values and use them when calculating the weighted averages for each value.

Describe alternatives you've considered

No response

Additional context

No response