[services] Tests - Add create new backup

Summary:
Depends on D4225

Adding a script for creating a new backup.

Test Plan: This, for now, doesn't do anything.

Reviewers: ashoat, palys-swm, varun

Reviewed By: palys-swm, varun

Subscribers: jimpo, ashoat, palys-swm, Adrian, atul, yayabosh

Differential Revision: https://phab.comm.dev/D4165