Change exception treatment on incremental snapshot wait (#12665)

Author: JoaoJandre

plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/KVMStorageProcessor.java

@@ -2047,7 +2047,7 @@ private void waitForBackup(String vmName) throws CloudRuntimeException {
             try {
                 Thread.sleep(10000);
             } catch (InterruptedException e) {
-                throw new CloudRuntimeException(e);
+                logger.trace("Thread that was tracking the progress for backup of VM [{}] was interrupted. Ignoring.", vmName);
             }
         }