add loader dry run

[nosnelmil]

Summary

Adds a dry run flag to the loader, enabling users to execute the loader without generating trace loads or running experiments. Also adds a simple validation for cpu limit field in loader config.

Implementation Notes :hammer_and_pick:

• Add a dryRun flag to the loader which accepts a boolean value.
• Modifies the execution flow to exit early by checking the dryRun flag just before calling RunExperiment via the experiment driver in the runTraceMode function
• Add a simple validation to ensure provided cpu limit in loader config is valid

External Dependencies :four_leaf_clover:

• N/A

Breaking API Changes :warning:

• N/A

Simply specify none (N/A) if not applicable.

[leokondrashov]

I think you forgot the CPU limit check that we were talking about, please add it

[nosnelmil]

I think you forgot the CPU limit check that we were talking about, please add it

Oh yes, thought I will be adding that in another PR, will add that in