Extra compensation reservation (inventory_reservation) in any update of credit memo

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### Preconditions (*)

1. Magento 2.4.3-p1 with magento/module-inventory 1.2.1-p1
2. With small data: profiles/ce/small.xml

### Steps to reproduce (*)

1. Create a full Credit Memo with not checked Return to Stock for one of products (for example: sales_creditmemo.entity_id = 1)
2. It creates registers into inventory_reservation. For example #2 lines.
3. Programmatically update some date of Credit Memo (CustomerNote for example). Something like this:
$soyUnMemo = $objectManager->create('Magento\Sales\Model\Order\Creditmemo')->load('1');
$soyUnMemo->setCustomerNote('Hi');
$soyUnMemo->save();

### Expected result (*)

1. The count of registers on inventory_reservation should be 2

### Actual result (*)

1. The count of registers on inventory_reservation is 4
2. And each time that we update Programmatically the credit memo, it adds two additional ones: 2->4->6->8
3. Each time, the salable qty is changing

Start with the Magento\Sales\Model\Order\Creditmemo save flow and the inventory_reservation records created when a full credit memo is saved. Reproduce the update using the provided CustomerNote example and inspect the reservation count after each save. Done means updating the credit memo no longer adds duplicate reservations or changes salable quantity.

Written by the indexing model from the issue text.