feat(payments_update): update payment_method_billing in payment update

[Narayanbhat166]

Type of Change

• New feature

Description

This PR allows the payment_method_billing to be updated in the payments update flow.

Motivation and Context

How did you test it?

• Create a payment with confirm as false

curl --location 'http://localhost:8080/payments' \
--header 'Content-Type: application/json' \
--header 'api-key: dev_VTitmyLzKQhsrNhv6DmgKbzAxaXOLKuWkcY37HT3f7vgWvXBIoYuIg4FU61EGVF6' \
--data-raw '{
    "amount": 6540,
    "currency": "USD",
    "confirm": false,
    "customer": {
        "id": "cus_PAxm0MeCGM5TowgDKPc9",
        "email": "example@juspay.in"
    }
}'

• Update the payment with payment_method_data.billing

curl --location 'http://localhost:8080/payments/pay_62qJ2OaJTzci4aKkXjm9' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_VTitmyLzKQhsrNhv6DmgKbzAxaXOLKuWkcY37HT3f7vgWvXBIoYuIg4FU61EGVF6' \
--data '{
    "payment_method_data": {
        "billing": {
            "address": {
                "line1": "1467",
                "line2": "Harrison Street",
                "city": "San Fransico",
                "state": "California",
                "zip": "94122",
                "country": "IN",
                "first_name": "Narayan",
                "last_name": "Bhat"
            }
        }
    }
}'

• Retrieve the payment and ensure that the billing details are updated

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code