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
*
         * @param currentState     current cluster state
         * @param updatedDeletions deletions with removed entry
         * @return updated snapshot in progress instance or {@code null} if there are no changes to it
         */
        @Nullable
        private SnapshotsInProgress updatedSnapshotsInProgress(ClusterState currentState, SnapshotDeletionsInProgress updatedDeletions) {
            final SnapshotsInProgress snapshotsInProgress = SnapshotsInProgress.get(currentState);
            final List<SnapshotsInProgress.Entry> snapshotEntries = new ArrayList<>();
            
            
            final Set<RepositoryShardId> reassignedShardIds = new HashSet<>();
            boolean changed = false;
            final String localNodeId = currentState.nodes().getLocalNodeId();
            final String repoName = deleteEntry.repository();
            InFlightShardSnapshotStates inFlightShardStates = null;
            
            
            final Set<IndexId> newIndexIdsToRefresh = new HashSet<>();
            for (SnapshotsInProgress.Entry entry : snapshotsInProgress.forRepo(repoName)) {
                if (entry.state().completed() == false) {
                    
                    
                    if (entry.isClone()) {
                        
                        final List<RepositoryShardId> canBeUpdated = new ArrayList<>();
                        for (Map.Entry<RepositoryShardId, ShardSnapshotStatus> value : entry.shardsByRepoShardId().entrySet()) {
                            if (value.getValue().equals(ShardSnapshotStatus.UNASSIGNED_QUEUED)
                                && reassignedShardIds.contains(value.getKey()) == false) {
                                canBeUpdated.add(value.getKey());