fix: correct MultiSafepay wallet and pay_later config for 5 test failures
- Klarna: tax_rate 0 -> 2100 (MultiSafepay rejects tax_rate 0)
- AliPay: add payment_experience redirect_to_url + description
- WeChatPay: add payment_experience redirect_to_url + description
- MbWay: add description hello world
- Commons.js: add ali_pay, we_chat_pay, mb_way to payment_methods_enabled