magento-test/app/code/Magento/Sales/etc/adminhtml/events.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="catalog_product_delete_before">
        <observer name="sales_quote_observer" instance="Magento\Sales\Observer\Backend\SubtractQtyFromQuotesObserver" />
    </event>
    <event name="catalogrule_before_apply">
        <observer name="sales_quote_observer" instance="Magento\Sales\Observer\Backend\CatalogPriceRule" />
    </event>
    <event name="catalogrule_after_apply">
        <observer name="sales_quote_observer" instance="Magento\Sales\Observer\Backend\CatalogPriceRule" />
    </event>
    <event name="catalog_product_save_after">
        <observer name="sales_quote" instance="Magento\Sales\Observer\Backend\CatalogProductSaveAfterObserver" />
    </event>
</config>