More investigation into 93271 (#93454)

We still don't properly understand why this test is failing, and it
doesn't reproduce locally, so this commit adds a little extra logging to
capture extra detail from a failure in CI.

qa/rolling-upgrade/build.gradle

@@ -39,6 +39,9 @@ BuildParams.bwcVersions.withWireCompatible { bwcVersion, baseName ->
     setting 'repositories.url.allowed_urls', 'http://snapshot.test*'
     setting 'path.repo', "${buildDir}/cluster/shared/repo/${baseName}"
     setting 'xpack.security.enabled', 'false'
+    setting 'logger.org.elasticsearch.cluster.service.MasterService', 'TRACE'
+    setting 'logger.org.elasticsearch.cluster.routing.allocation.allocator.DesiredBalanceShardsAllocator', 'TRACE'
+    setting 'logger.org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders', 'TRACE'
     requiresFeature 'es.index_mode_feature_flag_registered', Version.fromString("8.0.0")
   }
 

qa/rolling-upgrade/src/test/java/org/elasticsearch/upgrades/SnapshotBasedRecoveryIT.java

@@ -42,7 +42,6 @@ import static org.hamcrest.Matchers.notNullValue;
 
 public class SnapshotBasedRecoveryIT extends AbstractRollingTestCase {
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/93271")
     public void testSnapshotBasedRecovery() throws Exception {
         final String indexName = "snapshot_based_recovery";
         final String repositoryName = "snapshot_based_recovery_repo";