[GraphQl] Gift Message coverage for cart item

[Usik2203]

Description (*)

This PR extends PR #27956 (Parent PR)
add coverage for cart items,
add mutation for updating gift message of cart items
add parameters to StoreConfig

This PR was mentioned for fixing failed Integration test
#259
#251
#246

Fixed Issues (if relevant)

1. Fixes GraphQL Checkout :: Add support for Gift Wrapping / Gift Message during checkout. #28519 GraphQL Checkout :: Add support for Gift Wrapping / Gift Message during checkout.

Related Pull Requests

https://github.com/magento/partners-magento2-infrastructure/pull/3

Manual testing scenarios (*)

You can use this query for manual testing. You should take maskedQuoteId from quote_id_mask table
.. on SimpleCartItem
.. on ConfigurableCartItem
.. on BundleCartItem

{
    cart(cart_id: "maskedQuoteId") {
      items {
        product {
           name
        }
        ... on SimpleCartItem {
          gift_message {
            to
            from
            message
          }
        }
      }
    }
  }

Mutation for updating gift messages for cart items

mutation {
  updateCartItems(
    input: {
      cart_id: "Bw39gy3HyflLoJapHawMOnTHCOmean44",
      cart_items: [
        {
         cart_item_id: 48
          quantity: 3
         gift_message: {
            to: "Alex"
            from: "Aline"
            message: "Best regards"
          }
        }
      ]
    }
  ) {
    cart {
      items {
        id
        product {
         name
        }
        quantity
          ... on SimpleCartItem {
          gift_message {
            to
            from
            message
          }
        }
     }
    }
  }
}

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[rogyar]

Hi @Usik2203. Thank you for your collaboration. Please, check my comments below and feel free to proceed with the test coverage afterward.

Thank you!

[Usik2203]

@magento run all tests

[magento-engcom-team]

Hi @rogyar, thank you for the review.
ENGCOM-7559 has been created to process this Pull Request

[m2-assistant]

Hi @Usik2203, thank you for your contribution!
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