Update Jest tests for Set up paid ads flow

[joemcgill]

Caution

This is blocked by #2534, #2535, and #2536.

As a follow-up to the changes to streamline the paid ads flow defined in #2460, The related Jest tests will need to be updated once changes from the following issues are completed:

• Remove the accounts connection page from the Ads Setup flow #2534
• Consolidate the ad creation step in the Ads Setup flow with the one used in Onboarding #2535
• Remove the billing setup page from the Ads setup flow #2536

Acceptance criteria

• JS Unit tests related to the updated Ads Setup flow are passing (ex: https://github.com/woocommerce/google-listings-and-ads/actions/runs/10706073441)

Implementation details

This work should branch from the feature/2460-simplify-paid-ads-setup branch once each of the related issues listed in the overview of this ticket have been merged.

There is an AdsStepper test at js/src/setup-ads/ads-stepper/index.test.js that is currently failing.