We limit the number of concurrent blob downloads per node and per recovery, but if a user configures too many concurrent recoveries they may run out of per-node download permits which yields the following message:

> Unable to acquire permit to use snapshot files during recovery, this recovery will recover index files from the source node. Ensure snapshot files can be used during recovery by setting [indices.recovery.max_concurrent_snapshot_file_downloads] to be no greater than [25]

The `[25]` here is wrong, the 25 permits are shared across all inbound recoveries so we should divide the suggested value by `cluster.routing.allocation.node_concurrent_incoming_recoveries`. In extreme cases the user may have configured so many concurrent recoveries that the only reasonable limit is zero, and in that case we should suggest setting `indices.recovery.use_snapshots: false` instead.


test/framework/src/main/java/org/elasticsearch/test/MockLogAppender.java
private final AtomicBoolean assertMatchedCalled = new AtomicBoolean(false);
        private final LoggingExpectation delegate;
        private WrappedLoggingExpectation(LoggingExpectation delegate) {
            this.delegate = Objects.requireNonNull(delegate);
        }
        @Override
        public void match(LogEvent event) {
            delegate.match(event);
        }
        @Override
        public void assertMatched() {
            try {
                delegate.assertMatched();
            } finally {
                assertMatchedCalled.set(true);
            }
        }
        @Override
        public String toString() {
            return delegate.toString();
        }
    }
    public Releasable capturing(Class<?>... classes) {
        start();
        final var loggers = Arrays.stream(classes).map(LogManager::getLogger).toArray(Logger[]::new);
        for (final var logger : loggers) {