refactor(router): throw bad request error on applepay verification failure

[prajjwalkumar17]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Earlier we were throwing 2xx even when applepay verification was failing refactored it to throw 4xx

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

How did you test it?

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable

[likhinbopanna]

@prajjwalkumar17 Can you add the required test cases?

[prajjwalkumar17]

Previously we were getting 2xx even when this was error response

After this PR going in we will have the 4xx instead of 2xx
The CURL is

curl --location 'https://sandbox.hyperswitch.io/verify/apple_pay/merchant_1696932076' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: snd_XQpKjqRt9Z142lWu8KAF78MYyptaHEJhKdCmo01XEIgdyWfpSA7ByuM4FZnJccj5' \
--data '{
    "domain_names":["hyperswitch-demo-store.netlify."],
    "merchant_connector_account_id": "mca_UcnrI7xaIbHMAKZ7mABw"
}'