Mark Msrp, Newsletter, PageCache, Payment, Paypal and Quote interfaces as API

[sivaschenko]

The following interfaces should be marked as API in 2.4-develop branch

1. app/code/Magento/Msrp/Pricing/MsrpPriceCalculatorInterface.php
2. app/code/Magento/Newsletter/Model/SubscriptionManagerInterface.php
3. app/code/Magento/PageCache/Model/Spi/PageCacheTagsPreprocessorInterface.php
4. app/code/Magento/Payment/Api/Data/PaymentAdditionalInfoInterface.php
5. app/code/Magento/Payment/Model/Method/Online/GatewayInterface.php
6. app/code/Magento/Payment/Model/Method/TransparentInterface.php
7. app/code/Magento/Paypal/Helper/Shortcut/ValidatorInterface.php
8. app/code/Magento/Paypal/Model/Billing/Agreement/MethodInterface.php
9. app/code/Magento/Paypal/Model/IpnInterface.php
10. app/code/Magento/Paypal/Model/Payflow/Service/Response/Handler/HandlerInterface.php
11. app/code/Magento/Paypal/Model/Payflow/Service/Response/ValidatorInterface.php
12. app/code/Magento/Quote/Api/ChangeQuoteControlInterface.php
13. app/code/Magento/Quote/Model/Cart/BuyRequest/BuyRequestDataProviderInterface.php
14. app/code/Magento/Quote/Model/Product/QuoteItemsCleanerInterface.php
15. app/code/Magento/Quote/Model/Quote/Address/CustomAttributeListInterface.php
16. app/code/Magento/Quote/Model/Quote/Address/Total/CollectorInterface.php
17. app/code/Magento/Quote/Model/Quote/Address/Total/ReaderInterface.php
18. app/code/Magento/Quote/Model/Quote/Item/CartItemProcessorInterface.php
19. app/code/Magento/Quote/Model/ValidationRules/QuoteValidationRuleInterface.php
20. app/code/Magento/QuoteGraphQl/Model/Cart/BuyRequest/BuyRequestDataProviderInterface.php
21. app/code/Magento/QuoteGraphQl/Model/Cart/Payment/AdditionalDataProviderInterface.php
22. app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingAddressesOnCartInterface.php
23. app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingMethodsOnCartInterface.php
24. app/code/Magento/QuoteGraphQl/Model/CartItem/DataProvider/CustomizableOptionValueInterface.php
25. app/code/Magento/QuoteGraphQl/Model/CartItem/DataProvider/Processor/ItemDataProcessorInterface.php

[m2-assistant]

Hi @sivaschenko. Thank you for your report.
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@magento give me 2.4-develop instance - upcoming 2.4.x release

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[mrtuvn]

@magento i am working on this