[QA] Add Cypress coverage for bank redirect on airwallex

## Summary
Add Cypress test coverage for bank redirect payment methods (Ideal, Blik) on the Airwallex connector.

## What changed
- Updated `cypress-tests/cypress/e2e/configs/Payment/Airwallex.js` bank_redirect_pm configuration:
- Added billing addresses for Blik (PL) and Ideal (NL)
- Fixed Trustly exclusion: changed expected Response from status 200 to status 400 with IR_19 error, keeping TRIGGER_SKIP
- Spec file `18-BankRedirect.cy.js` verified (existing bank-redirect spec)

## Why
Add Ideal, blik bank redirect support for airwallex.

## Test Results
Full regression suite executed against airwallex connector. All 17 tests passed.

## Linked Issues
- Related to QAA-117