feat(checkout): CHECKOUT-0000 New test framework features

[bc-peng]

What?

• Add playwright video recording option in the config. (turned off by default)
• Add check for essential helper functions usage.
• Add check for essential env variables.
• Add checkout.selectPaymentMethod() helper function.
• Add displays of active API requests when applying presets.
• Update afterpay, bigpay, googlepay sample tests.

Why?

With better error-prevention mechanisms and helper functions, developers will find it eaiser to use the test framework.

Testing / Proof

CI.