Today we log a "deleting snapshots [...] from repository [...]" message at INFO level [almost the first thing](https://github.com/elastic/elasticsearch/blob/dfaec0dbf0c8a0ba2912381334019725848f1f5a/server/src/main/java/org/elasticsearch/snapshots/SnapshotsService.java#L1886-L1888) when we start the deletion. However, the requested snapshots may not exist or they may be wildcards to be matched against actual snapshots. In these cases, the log message is either misleading or insuffiicent. Instead we should log the message after we have successfully added the delete to the cluster state similar to how the [logging works for snapshot creation](https://github.com/elastic/elasticsearch/blob/f77c16b78bab5e9f3ee24974aeba408e254e8c94/server/src/main/java/org/elasticsearch/snapshots/SnapshotsService.java#L3804).
server/src/main/java/org/elasticsearch/snapshots/SnapshotsService.java
if (changedCount > 0) {
                logger.trace(
                    "changed cluster state triggered by [{}] snapshot state updates and resulted in starting " + "[{}] shard snapshots",
                    changedCount,
                    startedCount
                );
                return updated;
            }
            return existing;
        }
        void completeWithUpdatedState(SnapshotsInProgress snapshotsInProgress) {
            if (updatesByRepo.isEmpty() == false) {
                final var result = new ShardSnapshotUpdateResult(initialState.metadata(), snapshotsInProgress);
                for (final var taskContext : batchExecutionContext.taskContexts()) {
                    if (taskContext.getTask() instanceof ShardSnapshotUpdate task) {
                        taskContext.success(() -> task.listener.onResponse(result));
                    }
                }
            }
        }
        private SnapshotsInProgress.Entry applyToEntry(SnapshotsInProgress.Entry entry, List<ShardSnapshotUpdate> updates) {
            
            
            if (entry.state().completed() || updates.isEmpty()) {
                return entry;
            }
            return new EntryContext(entry, updates).computeUpdatedEntry();
        }
        
        private final class EntryContext {