[ECP-9194] Ensure Adyen payment methods load correctly

[RokPopov]

Description This PR addresses an issue where Adyen payment methods were not visible at the Magento checkout when both the Adyen Payment plugin (version 9.2.0) and Avalara Avatax plugin (version 2.5.0) were installed. The problem was caused by a conflict within the mixins of these plugins, where Avalara's asynchronous shipping-information request delayed the response with adyen_payment_methods_response.

Changes

• Refactored the initialization logic in the Adyen payment component to check the properties of the adyen-payment-service.js class instead of checking for a virtual quote
• Now calls getPaymentInformation() function if the paymentMethods or connectedTerminals observables are null

Tested scenarios

• proceeded through the checkout process with various combinations of products (virtual, physical)
• verified Adyen payment methods are correctly displayed in those scenarios

Fixes #2602

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud