Convert Shopper BNPL Checkout spec

[ismaeldcom]

Fixes #10060

Changes proposed in this Pull Request

• Modify shopper utils to implement expectFraudPreventionToken and selectPaymentMethod and update setupProductCheckout.
• Refactor affected tests by setupProductCheckout update.
• Implement Playwright shopper-bnpls-checkout spec
• Remove Puppeteer shopper-bnpls-checkout spec

Testing instructions

• Checkout dev/10060-convert-shopper-bnpls-checkout-spec
• Run npm run test:e2e-pw bnpls
• Test should pass locally.
• Test should pass in GH actions.

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• Run npm run changelog to add a changelog file, choose patch to leave it empty if the change is not significant. You can add multiple changelog files in one PR by running this command a few times.
• Covered with tests (or have a good reason not to test in description ☝️)
• Tested on mobile (or does not apply)

Post merge

• Link to testing instructions from release testing doc following these instructions : QA Testing Not Applicable
• Add or update critical flows and testing instructions for critical flows, if applicable.
• Add what's changed (description, screenshot, demo videos etc.) to the release announcement post, if applicable.