[Backport] Allow set billing information via API with existing address

[gelanivishal]

Original PR

#18704

Description (*)

Not setting the customerId with an existing address caused a
NoSuchEntityException to be thrown during address validation

magento2/app/code/Magento/Quote/Model/QuoteAddressValidator.php

Line 84 in 56af1e7

}, $this->customerRepository->getById($addressData->getCustomerId())->getAddresses());

Fixed Issues (if relevant)

1. Adding billing information via mine API expects costumer id #17485 Adding billing information via mine API expects costumer id

Manual testing scenarios (*)

1. Create Customer token and a quote with items that would be used to add shipping and billing information
2. A saved customer address .
3. Hit the products REST api rest/V1/carts/mine/billing-address with generated customer token in above state with a similar body as below

{
"address": {
      "customerAddressId":"{{ saved customer address id }}",
      "countryId":"MY",
      "regionId":"572",
      "regionCode":"MLK",
      "region":"Melaka",
      "street":[  
         "My home Any Floor, any Tower ,",
         "Unknown  Road"
      ],
      "telephone":"",
      "postcode":"12345",
      "city":"Melaka",
      "firstname":"Vishwas",
      "lastname":"Bhatnagar"
   }
}

4. Success and Returns quote address id

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @gelanivishal. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
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[magento-engcom-team]

Hi @VladimirZaets, thank you for the review.
ENGCOM-3314 has been created to process this Pull Request

[magento-engcom-team]

Hi @gelanivishal. Thank you for your contribution.
We will aim to release these changes as part of 2.2.8.
Please check the release notes for final confirmation.

Please, consider to port this solution to 2.3 release line.
You may use Porting tool to port commits automatically.