A user (on 7.17.7) reported to me a situation where they were attempting to delete a snapshot and would get the log message `deleting snapshots [snapshot-test] from repository [my-snapshots]` but then no further messages at `INFO` or above; enabling some internal logging indicated some low-level timeouts:

```
[DEBUG][com.amazonaws.latency    ] [instance-0123456789] MaxRetriesExceeded=[true], ServiceName=[Amazon S3], ServiceEndpoint=[https://REDACTED/], Exception=[java.net.SocketTimeoutException: Read timed out, java.net.SocketTimeoutException: Read timed out, java.net.SocketTimeoutException: Read timed out, java.net.SocketTimeoutException: Read timed out],...
```

This was enough for the user to go and investigate some performance issues in their repository, but I find the lack of logging concerning. Eventually the cluster state contains no ongoing snapshot deletion, but there is nothing in the logs to indicate that anything didn't work. The deletion API request had already timed out by this point so we can't return an error that way either. I'm opening this issue to make sure we investigate the missing logging.
server/src/main/java/org/elasticsearch/snapshots/SnapshotsService.java
}
            assert assertConsistent();
            return res;
        }
        boolean startDeletion(String deleteUUID) {
            return runningDeletions.add(deleteUUID);
        }
        void finishDeletion(String deleteUUID) {
            runningDeletions.remove(deleteUUID);
        }
        synchronized void addFinalization(Snapshot snapshot, Metadata metadata) {
            snapshotsToFinalize.computeIfAbsent(snapshot.getRepository(), k -> new LinkedList<>()).add(snapshot);
            this.latestKnownMetaData = metadata;
            assertConsistent();
        }
        /**
         * Clear all state associated with running snapshots. To be used on master-failover if the current node stops
         * being master.
         */
        synchronized void clear() {
            snapshotsToFinalize.clear();
            runningDeletions.clear();
            latestKnownMetaData = null;
        }
        synchronized boolean isEmpty() {
            return snapshotsToFinalize.isEmpty();
        }
        synchronized boolean assertNotQueued(Snapshot snapshot) {
            assert snapshotsToFinalize.getOrDefault(snapshot.getRepository(), new LinkedList<>())
                .stream()