framework/workload: add markers_enabled param for uiauto workloads
framework/workload: add markers_enabled param for uiauto workloads

Some workloads can insert timestamped markers into the logs if this
parameter is enabled in their automation. These markers can then be
used to look at measurements for specific parts of the execution.

ARM-software/workload-automation,lisatn/workload-automation,setrofim/workload-automation,setrofim/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,lisatn/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,lisatn/workload-automation