Fix edge case canceling an order with a deleted product

[convenient]

Prerequisites

• cataloginventory/options/synchronize_with_catalog=0 and indexer_mode=realtime
• or, cataloginventory/options/synchronize_with_catalog=1

To cover scenarios where the source items table is cleaned up upon delete, versus not

Fix an indexing issue when set to realtime (like when running the tests) and you delete a product, then cancel the order.

There were 2 errors:
1) Ampersand\DisableStockReservation\Test\Integration\Cancel\CancelOrderWithDeletedProduct::testCancelOrderWithDeletedProductAndNotSyncWithCatalog
Magento\Framework\Exception\InputException: Bad value was supplied.
/var/www/html/vendor/magento/module-catalog/Model/Indexer/Product/Price/Action/Rows.php:106
/var/www/html/vendor/magento/module-catalog/Model/Indexer/Product/Price.php:95
/var/www/html/vendor/magento/framework/Interception/Interceptor.php:58
/var/www/html/vendor/magento/framework/Interception/Interceptor.php:138
/var/www/html/vendor/magento/framework/Interception/Interceptor.php:153
/var/www/html/generated/code/Magento/Catalog/Model/Indexer/Product/Price/Interceptor.php:32
/var/www/html/vendor/magento/module-indexer/Model/Indexer.php:533
/var/www/html/vendor/magento/module-indexer/Model/Indexer/DependencyDecorator.php:294
/var/www/html/vendor/magento/framework/Indexer/AbstractProcessor.php:69
/current_extension/src/Service/ExecuteSourceDeductionForItems.php:172
/current_extension/src/Observer/CancelOrderItemObserver.php:55

Fix an issue where you cannot cancel an order, when you have deleted a product and also its source item, then cancel the order

2) Ampersand\DisableStockReservation\Test\Integration\Cancel\CancelOrderWithDeletedProduct::testCancelOrderWithDeletedProductAndSyncWithCatalog
Magento\Framework\Exception\NoSuchEntityException: Source item not found by source code: default and sku: product_will_be_deleted64b130378bd4d.
/var/www/html/vendor/magento/module-inventory-source-deduction-api/Model/GetSourceItemBySourceCodeAndSku.php:59
/current_extension/src/Model/SourceDeductionService/PatchedSourceDeductionService.php:82
/current_extension/src/Model/SourceDeductionService.php:30
/current_extension/src/Service/ExecuteSourceDeductionForItems.php:166
/current_extension/src/Observer/CancelOrderItemObserver.php:55
/var/www/html/vendor/magento/framework/Event/Invoker/InvokerDefault.php:88
/var/www/html/vendor/magento/framework/Event/Invoker/InvokerDefault.php:74
/var/www/html/vendor/magento/framework/Event/Manager.php:65
/var/www/html/generated/code/Magento/Framework/Event/Manager/Proxy.php:95
/var/www/html/vendor/magento/module-sales/Model/Order/Item.php:410
/var/www/html/vendor/magento/module-sales/Model/Order.php:1319
/var/www/html/vendor/magento/module-sales/Model/Order.php:1279
/current_extension/dev/MagentoTests/Integration/Cancel/CancelOrderWithDeletedProductTest.php:229

Checklist

• [x] Pull request has a meaningful description of its purpose, include affected Magento versions if it is a bug.
• [x] All commits are accompanied by meaningful commit messages
• [x] Tests have been ran / updated (see ./dev/README.md for how to run tests)