Increase max compilation limit in standalone tests

Some REST tests can rapid-fire script compilations that exceed the
default script compilations per minute. Rather than subjecting ourselves
to spurious failures because of the limit being too low, we opt for a
larger limit here.

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/ClusterFormationTasks.groovy

@@ -316,6 +316,8 @@ class ClusterFormationTasks {
         if (Version.fromString(node.nodeVersion).major >= 6) {
             esConfig['cluster.routing.allocation.disk.watermark.flood_stage'] = '1b'
         }
+        // increase script compilation limit since tests can rapid-fire script compilations
+        esConfig['script.max_compilations_per_minute'] = 2048
         esConfig.putAll(node.config.settings)
 
         Task writeConfig = project.tasks.create(name: name, type: DefaultTask, dependsOn: setup)