[EPC-9586] Fix card form validation after payment method switching

[candemiralp]

Description

The card component mount function is triggered again after re-selecting card payment method even though the card component is mounted in the first attempt. This action invalidates the isValid property of the card component and validate() function fails. Therefore, Place Order button stays deactivated. This PR checks the existences of the card component before triggering mount action.

Besides this issue, multishipping card payment has a similar issue in which stateData input field couldn't be populated again after re-selecting the card payment method. This issue occurs as the stateData is only assigned on onChange event callback. However, while switching the payment method, onChange callback is not triggered. This PR also addresses this issue in the multipshipping method renderer.

While handling this issue, more tests have been performed on alternative payment method with forms (SEPA Direct Debit etc.) and no issues have been observed.

Tested scenarios

• Switching the payment method after filling out the card form

Fixes #2898

[sonarqubecloud]

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 SonarQube Cloud