Add action that simulates heavy CPU load

[mkaszub]

Action is using Powershell or Bash script (depends on OS) to simulate heave CPU load for given time on Azure Compute Resource

[Lawouach]

cc @bugra-derre Might be of interest if you could give it a look please :)

[buderre]

Very useful PR in my opinion. @Lawouach : I think you should know that @mkaszub and me are working together and talked about this feature a lot :).

[mkaszub]

@Lawouach if you have a minute please take a look at my changes

[Lawouach]

Thanks a lot for your hardwork @mkaszub ! :)