Mark Checkout and Bundle blocks as API

[sivaschenko]

The following Blocks should be marked as API in 2.5-develop branch

1. Magento\Checkout\Block\Cart
2. Magento\Checkout\Block\Registration
3. Magento\Checkout\Block\Onepage
4. Magento\Checkout\Block\Onepage\Success
5. Magento\Checkout\Block\Onepage\Failure
6. Magento\Checkout\Block\Onepage\Link
7. Magento\Checkout\Block\Item\Price\Renderer
8. Magento\Checkout\Block\Cart\Grid
9. Magento\Checkout\Block\Cart\Totals
10. Magento\Checkout\Block\Cart\Sidebar
11. Magento\Checkout\Block\Cart\Shipping
12. Magento\Checkout\Block\Cart\Coupon
13. Magento\Checkout\Block\Cart\Item\Renderer
14. Magento\Checkout\Block\Cart\Item\Renderer\Actions
15. Magento\Checkout\Block\Cart\Item\Renderer\Actions\Remove
16. Magento\Checkout\Block\Cart\Item\Renderer\Actions\Edit
17. Magento\Checkout\Block\Cart\Additional\Info
18. Magento\Bundle\Block\Sales\Order\Items\Renderer
19. Magento\Bundle\Block\Adminhtml\Sales\Order\Items\Renderer
20. Magento\Bundle\Block\Adminhtml\Sales\Order\View\Items\Renderer

[m2-assistant]

Hi @sivaschenko. Thank you for your report.
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[Usik2203]

@magento I am working on this

[Usik2203]

HI @sivaschenko
I see that all these block already marked as API
Thanks