Add missing product_id key into $inventoryData

[GordonLesti]

When Update Attributes for many product with the function execute of controller Magento\Catalog\Controller\Adminhtml\Product\Action\Attribute\Save and the product has no stock item, the stock item is not created. The behavior of a normal product save is to create a stock item in that case, but the mass update with changed $inventoryData is not doing that because of the missing key product_id in line 165.

[vrann]

@GordonLesti Thank you for the contribution, but this change had already been accepted as a part of #8642