base: Print out info about the total noise

Created by: qais-yousef

When checking for noise in the experiment to verify there was minimal interference, we do the check against the total noise in the system but only print out the info about the noisiest task.

In latest integration branch, RampDown:test_task_placement is undecided in one case although the noisiest task is 0.24% and the threshold is 1%. This pattern is repeated, hence we need to print out more info about the total noise to help with the diagnosis.

Signed-off-by: Qais Yousef qais.yousef@arm.com