Making Downloads Atomic in bench.sh

[Spaarsh]

Is your feature request related to a problem or challenge?

As discussed under issue#13896 the downloading operations under the bench.sh are suggested to be made atomic i.e., if an action fails, all the changes made by it ought to be reverted.

Describe the solution you'd like

Ensuring that we have handlers that catch any errors and/or keyboard interruptions in the process is a suggested approach.

Describe alternatives you've considered

No response

Additional context

No response