Mute flaky test testThreeNodesNoClusterManagerBlock (#12093) (#12140)

(cherry picked from commit 90a815e)

Signed-off-by: Kunal Kotwani <kkotwani@amazon.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

build.gradle

@@ -537,6 +537,7 @@ subprojects {
         includeClasses.add("org.opensearch.snapshots.SnapshotStatusApisIT")
         includeClasses.add("org.opensearch.test.rest.ClientYamlTestSuiteIT")
         includeClasses.add("org.opensearch.upgrade.DetectEsInstallationTaskTests")
+        includeClasses.add("org.opensearch.cluster.MinimumClusterManagerNodesIT")
       }
     }
   }