[Issue] [Wishlist] Giving the possibility to set/update item description on item update

This issue is automatically created based on existing pull request: #28222: [Wishlist] Giving the possibility to set/update item description on item update

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Preconditions (*)

This PR improves the wishlist item update, by allowing to update the description while updating the wishlist item.

The problem occurs, when we want to set/update the item description in the same time when we update item's quantity, which doesn't seem to be supported for now.

Related Pull Requests

Fixed Issues (if relevant)

N/A

Steps to reproduce:

1. Create a simple product;
2. Log in on the storefront
3. Add the simple product to wishlist
4. Now, programmatically, try to update the quantity and the description for this item.

$wishlistId = 1;
$wishlistItemId = 1;

/** @var \Magento\Wishlist\Model\Wishlist $wishlist */
$wishlist = $objectManager->create(\Magento\Wishlist\Model\Wishlist::class);
$wishlistItemFactory = $objectManager->create(\Magento\Wishlist\Model\ItemFactory::class);
$wishlistItemResource = $objectManager->create(\Magento\Wishlist\Model\ResourceModel\Item::class);
$wishlist->load($wishlistId);

/** @var WishlistItem $wishlistItem */
$wishlistItem = $wishlistItemFactory->create();
$wishlistItemResource->load($wishlistItem, $wishlistItemId);
$wishlistItem->setDescription('My new description');
$wishlist->updateItem($wishlistItem, new \Magento\Framework\DataObject(['qty' => 777]));

Actual Result: ✖️ Quantity updated, but no description

Expected Result: ✔️ Quantity and description updated

Questions or comments

Looks like the description, is only used in case there is a new wishlist item created, which only happens if we're trying to update the item with some different options(custom options/super_attribute, etc) that are already added to wishlist.

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 are green)

[magento-engcom-team]

✅ Confirmed by @engcom-Alfa
Thank you for verifying the issue. Based on the provided information internal tickets MC-34989 were created

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