Avoid using WindowsFS in ClusterRerouteIT (#52488)

Issue #52000 looks like a case of cluster state updates being slower than
expected, but it seems that these slowdowns are relatively rare: most
invocations of `testDelayWithALargeAmountOfShards` take well under a minute in
CI, but there are occasional failures that take 6+ minutes instead.  When it
fails like this, cluster state persistence seems generally slow: most are
slower than expected, with some small updates even taking over 2 seconds to
complete.

The failures all have in common that they use `WindowsFS` to emulate Windows'
behaviour of refusing to delete files that are still open, by tracking all
files (really, inodes) and validating that deleted files are really closed
first. There is a suggestion that this is a little slow in the Lucene test
framework [1]. To see if we can attribute the slowdown to that common factor,
this commit suppresses the use of `WindowsFS` for this test suite.

[1] https://github.com/apache/lucene-solr/blob/4a513fa99f638cb65e0cae59bfdf7af410c0327a/lucene/test-framework/src/java/org/apache/lucene/util/TestRuleTemporaryFilesCleanup.java#L166

server/src/test/java/org/elasticsearch/cluster/allocation/ClusterRerouteIT.java

@@ -22,6 +22,7 @@
 import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.lucene.util.LuceneTestCase;
 import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
 import org.elasticsearch.action.admin.cluster.reroute.ClusterRerouteResponse;
 import org.elasticsearch.action.admin.cluster.reroute.TransportClusterRerouteAction;
@@ -74,6 +75,8 @@
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.hasSize;
 
+// testDelayWithALargeAmountOfShards does a lot of cluster state updates, and WindowsFS slows it down too much (#52000)
+@LuceneTestCase.SuppressFileSystems(value = "WindowsFS")
 @ClusterScope(scope = Scope.TEST, numDataNodes = 0)
 public class ClusterRerouteIT extends ESIntegTestCase {
     private final Logger logger = LogManager.getLogger(ClusterRerouteIT.class);